[5,6]-fused bicyclic antidiabetic compounds

ABSTRACT

Novel compounds of the structural formula (I), and the pharmaceutically acceptable salts thereof, are agonists of G-protein coupled receptor 40 (GPR40) and may be useful in the treatment, prevention and suppression of diseases mediated by the G-protein-coupled receptor 40. The compounds of the present invention may be useful in the treatment of Type 2 diabetes mellitus, and of conditions that are often associated with this disease, including obesity and lipid disorders, such as mixed or diabetic dyslipidemia, hyperlipidemia, hypercholesterolemia, and hypertriglyceridemia.

BACKGROUND OF THE INVENTION

Diabetes mellitus is a disease derived from multiple causative factors and characterized by elevated levels of plasma glucose (hyperglycemia) in the fasting state or after administration of glucose during an oral glucose tolerance test. There are two generally recognized forms of diabetes. In Type 1 diabetes, or insulin-dependent diabetes mellitus (IDDM), patients produce little or no insulin, the hormone which regulates glucose utilization. In Type 2 diabetes, or noninsulin-dependent diabetes mellitus (NIDDM), insulin is still produced in the body, however patients have a resistance to the effects of insulin in stimulating glucose and lipid metabolism in the insulin-sensitive muscle, liver and adipose tissues. Type 2 diabetes patients often have normal levels of insulin, and may have hyperinsulinemia (elevated plasma insulin levels), as they compensate for the reduced effectiveness of insulin by secreting increased amounts of insulin. This lack of responsiveness to insulin results in insufficient insulin-mediated activation of uptake, oxidation and storage of glucose in muscle, and inadequate insulin-mediated repression of lipolysis in adipose tissue and of glucose production and secretion in the liver.

Persistent or uncontrolled hyperglycemia is associated with increased and premature morbidity and mortality. Abnormal glucose homeostasis is associated both directly and indirectly with obesity, hypertension, and alterations of the lipid, lipoprotein and apolipoprotein metabolism, as well as other metabolic and hemodynamic disease. Patients with Type 2 diabetes mellitus have a significantly increased risk of macrovascular and microvascular complications, including atherosclerosis, coronary heart disease, stroke, peripheral vascular disease, hypertension, nephropathy, neuropathy, and retinopathy. Therefore, therapeutic control of glucose homeostasis, lipid metabolism, obesity, and hypertension are critically important in the clinical management and treatment of diabetes mellitus.

Patients who have insulin resistance often have Metabolic Syndrome (as defined in the Third Report of the National Cholesterol Education Program Expert Panel on Detection, Evaluation and Treatment of High Blood Cholesterol in Adults (Adult Treatment Panel III, or ATP III), National Institutes of Health, 2001, NIH Publication No. 01-3670). Patients with Metabolic Syndrome have an increased risk of developing the macrovascular and microvascular complications that occur with Type 2 diabetes, such as atherosclerosis and coronary heart disease.

There are several available treatments for Type 2 diabetes. Physical exercise and a reduction in dietary intake of calories are the recommended first-line treatment of Type 2 diabetes and of pre-diabetic conditions associated with insulin resistance, however compliance is generally poor. Pharmacologic treatments for diabetes have largely focused on three areas of pathophysiology: (1) hepatic glucose production (biguanides, such as phenformin and metformin), (2) insulin resistance (PPAR agonists, such as rosiglitazone, troglitazone, engliazone, balaglitazone, and pioglitazone), (3) insulin secretion (sulfonylureas, such as tolbutamide, glipizide and glimipiride); (4) incretin hormone mimetics (GLP-1 derivatives and analogs, such as exenatide, liraglutide, dulaglutide, semaglutide, lixisenatide, albiglutide and taspoglutide); and (5) inhibitors of incretin hormone degradation (DPP-4 inhibitors, such as sitagliptin, alogliptin, vildagliptin, linagliptin, denagliptin and saxagliptin).

The two best known biguanides, phenformin and metformin, cause some correction of hyperglycemia, but can also induce lactic acidosis and nausea/diarrhea. PPAR gamma agonists, such as rosiglitazone and pioglitazone, are modestly effective in reducing plasma glucose and Hemoglobin A1C. However, the currently marketed glitazones do not greatly improve lipid metabolism and may negatively effect on the lipid profile. The administration of insulin secretagogues, such as the sulfonylureas (e.g. tolbutamide, glipizide, and glimepiride) can result in hypoglycemia; their administration must therefore be carefully controlled.

There has been a renewed focus on pancreatic islet-based insulin secretion that is controlled by glucose-dependent insulin secretion. This approach has the potential for stabilization and restoration of 3-cell function. Several orphan G-protein coupled receptors (GPCR's) have been identified that are preferentially expressed in the β-cell and that are implicated in glucose stimulated insulin secretion (GSIS). GPR40 is a cell-surface GPCR that is highly expressed in human (and rodent) islets as well as in insulin-secreting cell lines. Several naturally-occurring medium to long-chain fatty acids (FA's) as well as synthetic compounds, including several members of the thiazolidinedione class of PPARγ agonists, have recently been identified as ligands for GPR40 [Itoh, Y. et al., Nature, 422: 173 (2003); Briscoe, C. P. et al., J. Biol. Chem., 278: 11303 (2003); Kotarsky, K. et al., Biochem. Biophys. Res. Comm., 301: 406 (2003)]. Under hyperglycemic conditions, GPR40 agonists are capable of augmenting the release of insulin from islet cells. The specificity of this response is suggested by results showing that the inhibition of GPR40 activity by siRNA attenuates FA-induced amplification of GSIS. These findings indicate that, in addition to the intracellular generation of lipid-derivatives of FA's that are thought to promote insulin release, FA's (and other synthetic GPR40 agonists) may also act as extracellular ligands that bind to GPR40 in mediating FA-induced insulin secretion. There are several potential advantages of GPR40 as a target for the treatment of Type 2 diabetes. First, since GPR40-mediated insulin secretion is glucose dependent, there is little or no risk of hypoglycemia. Second, the limited tissue distribution of GPR40 (mainly in islets) suggests that there would be less chance for side effects associated with GPR40 activity in other tissues. Third, GPR40 agonists that are active in the islets may have the potential to restore or preserve islet function. This would be advantageous, because long term diabetes therapy often leads to the gradual diminution of islet activity; after extended periods of treatment, it is often necessary to treat Type 2 diabetic patients with daily insulin injections. By restoring or preserving islet function, GPR40 agonists may delay or prevent the diminution and loss of islet function in a Type 2 diabetic patient.

Compounds that are agonists of G-protein-coupled receptor 40 (GPR40) may be useful to treat type 2 diabetes mellitus, obesity, hypertension, dyslipidemia, cancer, and metabolic syndrome, as well as cardiovascular diseases, such as myocardial infarction and stroke, by improving glucose and lipid metabolism and by reducing body weight. There is a need for potent GPR40 agonists that have pharmacokinetic and pharmacodynamic properties suitable for use as human pharmaceuticals.

G-protein-coupled receptor 40 (GPR40) agonists are disclosed in WO 2007/136572, WO 2007/136573, WO 2009/058237, WO 2006/083612, WO 2006/083781, WO 2010/085522, WO 2010/085525, WO 2010/085528, WO 2010/091176, WO 2004/041266, EP 2004/1630152, WO 2004/022551, WO 2005/051890, WO 2005/051373, EP 2004/1698624, WO 2005/086661, WO 2007/213364, WO 2005/063729, WO 2005/087710, WO 2006/127503, WO 2007/1013689, WO 2006/038738, WO 2007/033002, WO 2007/106469, WO 2007/123225, WO 2008/001931, WO 2008/030520, WO 2008/030618, WO 2008/054674, WO 2008/054675, WO 2008/066097, WO 2008/130514, WO 2009/048527, WO 2009/058237, WO 2009/111056, WO 2010/004347, WO 2010/045258, WO 2010/085522, WO 2010/085525, WO 2010/085528, WO 2010/091176, WO 2010/143733, WO 2012/0004187, WO 2012/011125, WO 2012/072691, WO2013/104257, WO 2013/122028, WO 2013/122029, WO 2013/128378, WO 2013/178575, WO 2014/073904, WO 2014/078608, WO 2014/078609, WO 2014/078610, WO 2014/078611, U.S. Pat. No. 8,030,354, U.S. Pat. No. 8,450,522, CN 103030646, CN 103012343, and GB 2498976.

GPR40 agonists are also disclosed in Negoro et al., ACS Medicinal Chemistry Letters (2010), 1(6), 290-294; Walsh et al., Bioorganic & Medicinal Chemistry Letters (2011), 21(11), 3390-3394; Zhou et al., Bioorganic & Medicinal Chemistry Letters (2010), 20(3), 1298-1301; Houze et al., Bioorganic & Medicinal Chemistry Letters (2012), 22(2), 1267-1270; Lu et al., Bioorganic & Medicinal Chemistry Letters (2013), 23(10), 2920-2924; Takano et al., Bioorganic & Medicinal Chemistry Letters (2014), 24(13), 2949-2953; Tan et al., Diabetes (2008), 57(8), 2211-2219; Brown et al., ACS Medicinal Chemistry Letters (2012), 3(9), 726-730; Lin et al., PloS One (2011), 6(11), e27270; Lou et al., PloS One (2012), 7(10), e46300; Lin et al., Molecular Pharmacology (2012), 82(5), 843-859; Yang, Lihu, Abstracts of Papers, 239th ACS Meeting, San Francisco, Calif., USA Mar. 21-25, 2010 MEDI-313; Houze et al., Abstracts of Papers, 243rd ACS National Meeting & Exposition, San Diego, Calif., USA Mar. 25-29, 2012, MEDI-265; Wang et al., ACS Medicinal Chemistry Letters (2013), 4(6), 551-555; and Du et al., ACS Medicinal Chemistry Letters (2014), 5(4), 384-389.

SUMMARY OF THE INVENTION

The present invention relates to novel substituted compounds of structural formula I:

and pharmaceutically acceptable salts thereof. The compounds of structural formula I, and embodiments thereof, are agonists of G-protein-coupled receptor 40 (GPR40) and may be useful in the treatment, prevention and suppression of diseases, disorders and conditions mediated by agonism of the G-protein-coupled receptor 40, such as Type 2 diabetes mellitus, insulin resistance, hyperglycemia, dyslipidemia, lipid disorders, obesity, hypertension, Metabolic Syndrome and atherosclerosis.

The present invention also relates to pharmaceutical compositions comprising the compounds of the present invention and a pharmaceutically acceptable carrier. The present invention also relates to methods for the treatment, control or prevention of disorders, diseases, and conditions that may be responsive to agonism of the G-protein-coupled receptor 40 in a subject in need thereof by administering the compounds and pharmaceutical compositions of the present invention. The present invention also relates to the use of compounds of the present invention for manufacture of a medicament useful in treating diseases, disorders and conditions that may be responsive to the agonism of the G-protein-coupled receptor 40. The present invention is also concerned with treatment of these diseases, disorders and conditions by administering the compounds of the present invention in combination with a therapeutically effective amount of another agent that may be useful to treat the disease, disorder and condition. The invention is further concerned with processes for preparing the compounds of this invention.

DETAILED DESCRIPTION OF THE INVENTION

The present invention is concerned with novel compounds of structural Formula I:

or a pharmaceutically acceptable salt thereof; wherein “a” is a single bond or a double bond, provided that if “a” is a double bond, then R⁵ and R⁶ are absent; T is selected from the group consisting of:

(1) CH,

(2) N, and

(3) N-oxide;

U is selected from the group consisting of:

(1) CR¹,

(2) N, and

(3) N-oxide;

V is selected from the group consisting of:

(1) CR²,

(2) N, and

(3) N-oxide;

W is selected from the group consisting of:

(1) CH,

(2) N, and

(3) N-oxide,

provided that no more than two of T, U, V and W are selected from N and N-oxide, further provided that if both T and W are N or N-oxide, then R³ is absent, and further provided that both U and V are not N or N-oxide; X is selected from the group consisting of:

(1) oxygen,

(2) sulfur,

(3) —CR^(g)R^(g),

(4) S(O)₂,

(5) C═O,

(6) —C(R^(g))OC₁₋₆alkyl,

(7) —CF₂, and

(8) —NR^(c);

A is selected from the group consisting of:

(1) aryl,

(2) —C₁₋₆alkyl-aryl,

(3) —C(O)-aryl,

(4) heteroaryl,

(5) —C₁₋₆alkyl-heteroaryl,

(6) —C(O)-heteroaryl,

(7) —C₃₋₆cycloalkyl,

(8) —C₁₋₆alkyl-C₃₋₆cycloalkyl,

(9) —C(O)—C₃₋₆cycloalkyl,

(10) —C₂₋₅cycloheteroalkyl,

(11) —C₁₋₆alkyl-C₂₋₅cycloheteroalkyl, and

(12) —C(O)—C₂₋₅cycloheteroalkyl,

wherein A is unsubstituted or substituted with one to five substituents independently selected from R^(a); B is selected from the group consisting of:

(1) hydrogen,

(2) aryl,

(3) aryl-O—,

(4) aryl-C₁₋₁₀ alkyl-,

(5) aryl-C₁₋₁₀ alkyl-O—,

(6) C₃₋₆cycloalkyl,

(7) C₃₋₆cycloalkyl-C₁₋₁₀alkyl-,

(8) C₃₋₆cycloalkyl-C₁₋₁₀alkyl-O—,

(9) C₃₋₆cycloalkenyl,

(10) C₃₋₆cycloalkenyl-C₁₋₁₀alkyl-,

(11) C₃₋₆cycloalkenyl-C₁₋₁₀alkyl-O—,

(12) C₂₋₅cycloheteroalkyl,

(13) C₃₋₆cycloheteroalkyl-C₁₋₁₀alkyl-,

(14) C₃₋₆cycloheteroalkyl-C₁₋₁₀alkyl-O—,

(15) heteroaryl,

(16) heteroaryl-O—,

(17) heteroaryl-C₁₋₁₀ alkyl-, and

(18) heteroaryl-C₁₋₁₀ alkyl-O—,

wherein B is unsubstituted or substituted with one to five substituents selected from R^(b); R¹ and R² are each independently selected from:

(1) a bond,

(2) hydrogen,

(3) halogen,

(4) —OR^(k),

(5) —CN,

(6) —C₁₋₆alkyl,

(7) —C₃₋₆cycloalkyl,

(8) C₃₋₆cycloalkyl-C₁₋₃alkyl-,

(9) —C₂₋₆cycloheteroalkyl, and

(10) C₂₋₆cycloheteroalkyl-C₁₋₃ alkyl-,

wherein each alkyl, cycloalkyl and cycloheteroalkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein one of R¹ and R² is substituted with R⁷, or R¹ and R² together with the atom(s) to which they are attached form a C₃₋₆cycloalkyl ring or a C₂₋₅cycloheteroalkyl ring containing 0-2 additional heteroatoms independently selected from oxygen, sulfur and N—R^(g), wherein each R¹ and R² is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein one of R¹ and R² is substituted with R⁷; R³ is absent or if present R³ is selected from the group consisting of:

(1) hydrogen,

(2) halogen,

(3) —OR^(e),

(4) —CN,

(5) —C₁₋₆alkyl,

(6) —C₃₋₆cycloalkyl, and

(7) C₃₋₆cycloalkyl-C₁₋₃alkyl-,

wherein each alkyl and cycloalkyl is unsubstituted or substituted with one to three substituents independently selected from R^(i); R⁴ is selected from the group consisting of:

(1) hydrogen,

(2) halogen,

(3) OR^(e),

(4) C₀₋₅alkylNR^(c)R^(d),

(5) C₁₋₆alkyl,

(6) C₁₋₆alkyl-O—,

(7) C₃₋₆cycloalkyl,

(8) C₃₋₆cycloalkyl-O—,

(9) C₃₋₆cycloalkyl-C₁₋₁₀alkyl-,

(10) C₃₋₆cycloalkyl-C₁₋₁₀alkyl-O—,

(11) C₂₋₅cycloheteroalkyl,

(12) C₂₋₅cycloheteroalkyl-O—,

(13) C₂₋₅cycloheteroalkyl-C₁₋₁₀alkyl-,

(14) C₂₋₅cycloheteroalkyl-C₁₋₁₀alkyl-O—,

(15) aryl,

(16) aryl-O—,

(17) aryl-C₁₋₁₀alkyl-,

(18) heteroaryl,

(19) heteroaryl-O—, and

(20) heteroaryl-C₁₋₁₀alkyl-,

wherein each alkyl, cycloalkyl, cycloheteroalkyl, aryl and heteroaryl is unsubstituted or substituted with one to three substituents independently selected from R^(j); R⁵ is absent or if present R⁵ is selected from the group consisting of:

(1) hydrogen,

(2) —C₁₋₆alkyl, and

(3) —C₃₋₆cycloalkyl,

wherein each alkyl and cycloalkyl is unsubstituted or substituted with one to three substituents independently selected from R^(j); R⁶ is absent or if present R⁶ is selected from the group consisting of:

(1) hydrogen,

(2) —C₁₋₆alkyl, and

(3) —C₃₋₆cycloalkyl,

wherein each alkyl and cycloalkyl is unsubstituted or substituted with one to three substituents independently selected from R^(j); R⁷ is selected from the group consisting of:

(1) —CO₂R⁸,

(2) —C₁₋₆alkyl-CO₂R⁸,

(3) —C₁₋₆alkyl-CONHSO₂R^(m),

(4) —C₁₋₆alkyl-SO₂NHCOR^(m),

(5) —C₁₋₆alkyl-tetrazolyl, and

(6) a cycloheteroalkyl selected from the group consisting of:

R⁸ is selected from the group consisting of:

(1) hydrogen,

(2) —C₁₋₆alkyl,

(3) —C₃₋₆cycloalkyl, and

(4) aryl-C₁₋₆alkyl,

wherein each alkyl, cycloalkyl and aryl is unsubstituted or substituted with one to three substituents independently selected from R^(j); R^(a) is selected from the group consisting of:

(1) —C₁₋₆alkyl,

(2) halogen,

(3) —C₀₋₆alkyl-OR^(e),

(4) —C₀₋₆alkyl-NR^(c)S(O)_(n)R^(e),

(5) —C₀₋₆alkyl-S(O)_(n)R^(e),

(6) —C₀₋₆alkyl-S(O)_(n)NR^(c)R^(d),

(7) —C₀₋₆alkyl-NR^(c)R^(d),

(8) —C₀₋₆alkyl-C(O)R^(e),

(9) —C₀₋₆alkyl-OC(O)R^(e),

(10) —C₀₋₆alkyl-CO₂R^(e),

(11) —C₀₋₆alkyl-CN,

(12) —C₀₋₆alkyl-C(O)NR^(c)R^(d),

(13) —C₀₋₆alkyl-NR^(c)C(O)R^(e),

(14) —C₀₋₆alkyl-NR^(c)C(O)OR^(e),

(15) —C₀₋₆alkyl-NR^(c)C(O)NR^(c)R^(d),

(16) —CF₃,

(17) —OCF₃,

(18) —OCHF₂,

(19) —C₀₋₆alkyl-aryl,

(20) —C₀₋₆alkyl-heteroaryl,

(21) —C₀₋₆alkyl-C₃₋₁₀cycloalkyl,

(22) —C₀₋₆alkyl-C₃₋₁₀cycloalkenyl, and

(23) —C₀₋₆alkyl-C₂₋₁₀cycloheteroalkyl,

wherein each alkyl, cycloalkyl, cycloalkenyl, cycloheteroalkyl, aryl and heteroaryl is unsubstituted or substituted with one to five substituents independently selected from: —C₁₋₆alkyl, halogen, OH, —O—C₁₋₆alkyl, —S(O)₂—C₁₋₄alkyl, —CN, —OCHF₂, —OCF₃, —CF₃, and —C₀₋₆alkyl-NR^(c)R^(d); R^(b) is independently selected from the group consisting of:

(1) —C₁₋₁₀alkyl,

(2) —C₂₋₁₀alkenyl,

(3) —CF₃,

(4) halogen,

(5) —CN,

(6) —OH,

(7) —OC₁₋₁₀alkyl,

(8) —OC₂₋₁₀alkenyl,

(9) —O(CH₂)pOC₁₋₁₀alkyl,

(10) —O(CH₂)pC₃₋₆cycloalkyl,

(11) —O(CH₂)pC₃₋₆ cycloalkyl-C₁₋₁₀alkyl,

(12) —O(CH₂)pC₂₋₅cycloheteroalkyl,

(13) —O(CH₂)pC₂₋₅cycloheteroalkyl-C₁₋₁₀alkyl,

(14) —O-aryl,

(15) —O-heteroaryl,

(16) —O-aryl-C₁₋₁₀alkyl,

(17) —O-heteroaryl-C₁₋₁₀alkyl,

(18) —O(CH₂)pNR^(c)S(O)_(m)R^(e),

(19) —O(CH₂)pS(O)_(m)R^(e),

(20) —O(CH₂)pS(O)_(m)NR^(c)R^(d),

(21) —O(CH₂)pNR^(c)R^(d),

(22) —C(O)R^(e),

(23) —OC(O)R^(e),

(24) —CO₂R^(e),

(25) —C(O)NR^(c)R^(d),

(26) —NR^(c)C(O)R^(e),

(27) —NR^(c)C(O)OR^(e),

(28) —NR^(c)C(O)NR^(c)R^(d),

(29) —O(CH₂)pO-C₃₋₆cycloalkyl,

(30) —O(CH₂)pO-C₂₋₅cycloheteroalkyl,

(31) —OCF₃,

(32) —OCHF₂,

(33) —(CH₂)pC₃₋₆cycloalkyl,

(34) —(CH₂)pC₂₋₅cycloheteroalkyl,

(35) aryl,

(36) heteroaryl,

(37) aryl-C₁₋₁₀alkyl-, and

(38) heteroaryl-C₁₋₁₀alkyl-,

wherein each CH, CH₂, alkyl, alkenyl, cycloalkyl, cycloheteroalkyl, aryl and heteroaryl is unsubstituted or substituted with one to five substituents independently selected from: —C₁₋₆alkyl, halogen, OH, —O—C₁₋₆alkyl and —CF₃; R^(c) and R^(d) are each independently selected from the group consisting of:

(1) hydrogen,

(2) C₁₋₁₀alkyl,

(3) C₂₋₁₀alkenyl,

(4) C₃₋₆cycloalkyl,

(5) C₃₋₆ cycloalkyl-C₁₋₁₀alkyl-,

(6) C₂₋₅cycloheteroalkyl,

(7) C₂₋₅cycloheteroalkyl-C₁₋₁₀alkyl-,

(8) aryl,

(9) heteroaryl,

(10) aryl-C₁₋₁₀alkyl-, and

(11) heteroaryl-C₁₋₁₀alkyl-,

wherein each alkyl, alkenyl, cycloalkyl, cycloheteroalkyl, aryl and heteroaryl is unsubstituted or substituted with one to three substituents independently selected from R^(f), or R^(c) and R^(d) together with the atom(s) to which they are attached form a C₂₋₁₀cycloheteroalkyl ring containing 0-2 additional heteroatoms independently selected from oxygen, sulfur and N—R^(g), wherein each R^(c) and R^(d) is unsubstituted or substituted with one to three substituents independently selected from R^(f); each R^(e) is independently selected from the group consisting of:

(1) hydrogen,

(2) —C₁₋₁₀alkyl,

(3) —C₂₋₁₀ alkenyl,

(4) —C₃₋₆ cycloalkyl,

(5) C₃₋₆ cycloalkyl-C₁₋₁₀alkyl-,

(6) —C₂₋₅cycloheteroalkyl,

(7) C₂₋₅cycloheteroalkyl-C₁₋₁₀alkyl-,

(8) aryl,

(9) aryl-C₁₋₁₀alkyl-,

(10) heteroaryl, and

(11) heteroaryl-C₁₋₁₀alkyl-,

wherein each alkyl, alkenyl, cycloalkyl, cycloheteroalkyl, aryl and heteroaryl is unsubstituted or substituted with one to three substituents independently selected from R^(h); each R^(f) is selected from the group consisting of:

(1) halogen,

(2) C₁₋₁₀alkyl,

(3) —OH,

(4) —O—C₁₋₄alkyl,

(5) —S(O)_(m)—C₁₋₄alkyl,

(6) —CN,

(7) —CF₃,

(8) —OCHF₂, and

(9) —OCF₃,

wherein each alkyl is unsubstituted or substituted with one to three substituents independently selected from: —OH, halogen, C₁₋₆alkyl, cyano and S(O)₂C₁₋₆alkyl; each R^(g) is selected from the group consisting of:

(1) hydrogen,

(2) —C(O)R^(e), and

(3) —C₁₋₁₀alkyl,

wherein each alkyl is unsubstituted or substituted with one to five halogens; each R^(h) is selected from the group consisting of:

(1) halogen,

(2) C₁₋₁₀alkyl,

(3) —OH,

(4) —O—C₁₋₄alkyl,

(5) —S(O)_(m)—C₁₋₄alkyl,

(6) —CN,

(7) —CF₃,

(8) —OCHF₂, and

(9) —OCF₃,

wherein each alkyl is unsubstituted or substituted with one to three substituents independently selected from: —OH, halogen, C₁₋₆alkyl, cyano and S(O)₂C₁₋₆alkyl; each R¹ is independently selected from the group consisting of:

(1) —C₁₋₆alkyl,

(2) —OR^(e),

(3) —NR^(c)S(O)_(m)R^(e),

(4) halogen,

(5) —S(O)_(m)R^(e),

(6) —S(O)_(m)NR^(c)R^(d),

(7) —NR^(c)R^(d),

(8) —C(O)R^(e),

(9) —OC(O)R^(e),

(10) —CO₂R^(e),

(11) —CN,

(12) —C(O)NR^(c)R^(d),

(13) —NR^(c)C(O)R^(e),

(14) —NR^(c)C(O)OR^(e),

(15) —NR^(c)C(O)NR^(c)R^(d),

(16) —CF₃,

(17) —OCF₃,

(18) —OCHF₂,

(19) —C₃₋₆cycloalkyl, and

(20) —C₂₋₅cycloheteroalkyl;

each R^(j) is independently selected from the group consisting of:

(1) —C₁₋₆alkyl,

(2) —OR^(e),

(3) —NR^(c)S(O)_(m)R^(e),

(4) halogen,

(5) —S(O)_(m)R^(e),

(6) —S(O)_(m)NR^(c)R^(d),

(7) —NR^(c)R^(d),

(8) —C(O)R^(e),

(9) —OC(O)R^(e),

(10) —CO₂R^(e),

(11) —CN,

(12) —C(O)NR^(c)R^(d),

(13) —NR^(c)C(O)R^(e),

(14) —NR^(c)C(O)OR^(e),

(15) —NR^(c)C(O)NR^(c)R^(d),

(16) —CF₃,

(17) —OCF₃,

(18) —OCHF₂,

(19) —C₃₋₆cycloalkyl, and

(20) —C₂₋₅cycloheteroalkyl;

each R^(k) is independently selected from the group consisting of:

(1) hydrogen,

(2) —C₁₋₆ alkyl,

(3) —C₁₋₆alkyl-SO₂C₁₋₆alkyl,

(4) —CF₃, and

(5) —CHF₂,

wherein each alkyl is unsubstituted or substituted with one to three substituents independently selected from: —OH, —OC₁₋₆alkyl, halogen, cyano, and —S(O)₂C₁₋₆alkyl; each R^(L) is independently selected from the group consisting of:

(1) —CO₂C₁₋₆alkyl,

(2) —C₁₋₁₀alkyl,

(3) —C₂₋₁₀ alkenyl,

(4) —C₂₋₁₀alkynyl,

(5) —C₃₋₆cycloalkyl,

(6) —C₂₋₆cycloheteroalkyl,

(7) aryl, and

(8) heteroaryl,

wherein each alkyl, alkenyl, alkynyl, cycloalkyl, cycloheteroalkyl, aryl and heteroaryl is unsubstituted or substituted with one to four substituents independently selected from C₁₋₆alkyl, halogen, and —OC₁₋₆alkyl; each R^(m) is independently selected from the group consisting of:

(1) —C₁₋₁₀alkyl,

(2) —C₂₋₁₀ alkenyl,

(3) —C₃₋₆ cycloalkyl,

(4) C₃₋₆ cycloalkyl-C₁₋₁₀alkyl-,

(5) —C₂₋₅cycloheteroalkyl,

(6) C₂₋₅cycloheteroalkyl-C₁₋₁₀alkyl-,

(7) aryl,

(8) heteroaryl,

(9) aryl-C₁₋₁₀alkyl-, and

(10) heteroaryl-C₁₋₁₀alkyl-;

each n is independently selected from: 0, 1 or 2; each m is independently selected from: 0, 1 or 2; each p is independently selected from: 0, 1, 2, 3, 4, 5 or 6; and each r is independently selected from: 0, 1, 2 and 3.

The invention has numerous embodiments, which are summarized below. The invention includes the compounds as shown, and also includes individual diastereoisomers, enantiomers, and epimers of the compounds, and mixtures of diastereoisomers and/or enantiomers thereof including racemic mixtures.

In one embodiment of the present invention, “a” is a single bond. In another embodiment of the present invention, “a” is a single bond and R⁵ and R⁶ are present.

In another embodiment of the present invention, “a” is a double bond. In another embodiment of the present invention, “a” is a double bond and R⁵ and R⁶ are absent.

In another embodiment of the present invention, T is selected from the group consisting of: CH, N and N-oxide. In a class of this embodiment, T is selected from the group consisting of: CH and N. In another class of this embodiment, T is CH. In another class of this embodiment, T is N or N-oxide. In another class of this embodiment, T is N. In another class of this embodiment, T is N-oxide.

In another embodiment of the present invention, U is selected from the group consisting of: CR¹, N and N-oxide. In a class of this embodiment, U is selected from the group consisting of: CR¹ and N. In another class of this embodiment, U is CR¹. In another class of this embodiment, U is N or N-oxide. In another class of this embodiment, U is N. In another class of this embodiment, U is N-oxide.

In another embodiment of the present invention, V is selected from the group consisting of: CR², N and N-oxide. In a class of this embodiment, V is selected from the group consisting of: CR² and N. In another class of this embodiment, V is CR². In another class of this embodiment, V is N or N-oxide. In another class of this embodiment, V is N. In another class of this embodiment, V is N-oxide.

In another embodiment of the present invention, W is selected from the group consisting of: CH, N and N-oxide, provided that no more than two of T, U, V and W are selected from N and N-oxide, further provided that if both T and W are N or N-oxide, then R³ is absent, and further provided that both U and V are not N or N-oxide. In a class of this embodiment, W is selected from the group consisting of: CH and N, provided that no more than two of T, U, V and W are selected from N and N-oxide, further provided that if both T and W are N or N-oxide, then R³ is absent, and further provided that both U and V are not N or N-oxide. In another class of this embodiment, W is CH, provided that no more than two of T, U, V and W are selected from N and N-oxide, further provided that if both T and W are N or N-oxide, then R³ is absent, and further provided that both U and V are not N or N-oxide. In another class of this embodiment, W is N or N-oxide, provided that no more than two of T, U, V and W are selected from N and N-oxide, further provided that if both T and W are N or N-oxide, then R³ is absent, and further provided that both U and V are not N or N-oxide. In another class of this embodiment, W is N, provided that no more than two of T, U, V and W are selected from N and N-oxide, further provided that if both T and W are N or N-oxide, then R³ is absent, and further provided that both U and V are not N or N-oxide.

In another embodiment of the present invention, W is selected from the group consisting of: CH, N and N-oxide. In a class of this embodiment, W is selected from the group consisting of: CH and N. In another class of this embodiment, W is CH. In another class of this embodiment, W is N or N-oxide. In another class of this embodiment, W is N. In another class of this embodiment, W is N-oxide.

In another embodiment of the present invention, T is CH, U is CR¹, V is CR², and W is CH. In a class of this embodiment, T is CH, U is CR¹, V is CH, and W is CH. In another class of this embodiment, T is CH, U is CH, V is CR², and W is CH.

In another embodiment of the present invention, T is N or N-oxide, U is CR¹, V is CR², and W is CH. In a class of this embodiment, T is N, U is CR¹, V is CR², and W is CH. In another embodiment of the present invention, T is CH, U is N or N-oxide, and V is CR², and W is CH. In a class of this embodiment, T is CH, U is N, V is CR², and W is CH. In another embodiment of the present invention, T is CH, U is CR¹, V is N or N-oxide, and W is CH. In a class of this embodiment, T is CH, U is CR¹, and V is N or N-oxide, and W is CH. In another embodiment of the present invention, T is CH, U is CR¹, V is CR², and W is CH, N or N-oxide. In another embodiment of the present invention, T is CH, U is CR¹, V is CR², and W is N or N-oxide. In a class of this embodiment, T is CH, U is CR¹, V is CR², and W is N.

In another embodiment of the present invention, T is N or N-oxide, U is N or N-oxide, V is CR², and W is CH. In a class of this embodiment, T is N, U is N, V is CR², and W is CH. In another embodiment of the present invention, T is N or N-oxide, U is CR¹, V is N or N-oxide, and W is CH. In a class of this embodiment, T is N, U is CR¹, V is N, and W is CH. In another embodiment of the present invention, T is N or N-oxide, U is CR¹, V is CR², and W is N or N-oxide. In a class of this embodiment, T is N, U is CR¹, V is CR², and W is N. In another embodiment of the present invention, T is N or N-oxide, U is CR¹, V is CR², and W is N or N-oxide; and R³ is absent. In a class of this embodiment, T is N, U is CR¹, V is CR², and W is N; and R³ is absent. In another embodiment of the present invention, T is CH, U is N or N-oxide, V is CR², and W is N or N-oxide. In a class of this embodiment, T is CH, U is N, V is CR², and W is N. In another embodiment of the present invention, T is CH, U is CR¹, V is N or N-oxide, and W is N or N-oxide. In a class of this embodiment, T is CH, U is CR¹, V is N, and W is N. In another embodiment of the present invention, T is CH; U is CR¹; V is CR²; and W is CH, N or N-oxide.

In another embodiment of the present invention, X is selected from the group consisting of: oxygen, sulfur, S(O)₂, C═O, —CF₂, and —NR^(c). In another embodiment of the present invention, X is selected from the group consisting of: oxygen, sulfur, and —NR^(c). In another embodiment of the present invention, X is selected from the group consisting of: oxygen, and —NR^(c). In another embodiment of the present invention, X is —NR^(c). In another embodiment of the present invention, X is oxygen.

In another embodiment of the present invention, A is selected from the group consisting of: aryl, —C₁₋₆alkyl-aryl, heteroaryl, —C₁₋₆alkyl-heteroaryl, —C₃₋₆cycloalkyl, —C₁₋₆alkyl-C₃₋₆cycloalkyl, —C₂₋₅cycloheteroalkyl, and —C₁₋₆alkyl-C₂₋₅cycloheteroalkyl, wherein A is unsubstituted or substituted with one to five substituents independently selected from R^(a). In another embodiment of the present invention, A is selected from the group consisting of: aryl, —C₁₋₆alkyl-aryl, heteroaryl, —C₁₋₆alkyl-heteroaryl, —C₂₋₅cycloheteroalkyl, and —C₁₋₆alkyl-C₂₋₅cycloheteroalkyl, wherein A is unsubstituted or substituted with one to five substituents independently selected from R^(a). In another embodiment of the present invention, A is selected from the group consisting of: aryl, —C₁₋₆alkyl-aryl, heteroaryl, and —C₁₋₆alkyl-heteroaryl, wherein A is unsubstituted or substituted with one to five substituents independently selected from R^(a).

In another embodiment of the present invention, A is selected from the group consisting of: aryl, —C₁₋₆alkyl-aryl, and heteroaryl, wherein A is unsubstituted or substituted with one to five substituents independently selected from R^(a). In a class of this embodiment, A is selected from the group consisting of: phenyl, —CH₂-phenyl, and pyridyl, wherein A is unsubstituted or substituted with one to four substituents independently selected from R^(a).

In another embodiment of the present invention, A is selected from the group consisting of: aryl, —C₁₋₆alkyl-aryl, and heteroaryl, wherein A is unsubstituted or substituted with one substituent independently selected from R^(a). In a class of this embodiment, A is selected from the group consisting of: phenyl, —CH₂-phenyl, and pyridyl, wherein A is unsubstituted or substituted with one substituent independently selected from R^(a).

In another embodiment of the present invention, A is selected from the group consisting of: aryl, and heteroaryl, wherein A is unsubstituted or substituted with one to five substituents independently selected from R^(a). In a class of this embodiment, A is selected from the group consisting of: phenyl, and pyridyl, wherein A is unsubstituted or substituted with one to four substituents independently selected from R^(a).

In another embodiment of the present invention, A is selected from the group consisting of: aryl, and heteroaryl, wherein A is unsubstituted or substituted with one substituent independently selected from R^(a). In a class of this embodiment, A is selected from the group consisting of: phenyl, and pyridyl, wherein A is unsubstituted or substituted with one substituent independently selected from R^(a).

In another embodiment of the present invention, A is selected from the group consisting of: —C₁₋₆alkyl-aryl, and heteroaryl, wherein A is unsubstituted or substituted with one to five substituents independently selected from R^(a). In a class of this embodiment, A is selected from the group consisting of: —CH₂-phenyl, and pyridyl, wherein A is unsubstituted or substituted with one to four substituents independently selected from R^(a).

In another embodiment of the present invention, A is aryl, wherein aryl is unsubstituted or substituted with one to five substituents independently selected from R^(a). In a class of this embodiment, A is phenyl, wherein phenyl is unsubstituted or substituted with one to four substituents independently selected from R^(a).

In another embodiment of the present invention, A is —C₁₋₆alkyl-aryl, wherein A is unsubstituted or substituted with one to five substituents independently selected from R^(a). In a class of this embodiment, A is —CH₂-phenyl, wherein A is unsubstituted or substituted with one to four substituents independently selected from R^(a).

In another embodiment of the present invention, A is heteroaryl, wherein heteroaryl is unsubstituted or substituted with one to five substituents independently selected from R^(a). In a class of this embodiment, A is pyridyl, wherein pyridyl is unsubstituted or substituted with one to four substituents independently selected from R^(a).

In another embodiment of the present invention, B is selected from the group consisting of: hydrogen, aryl, aryl-O—, aryl-C₁₋₁₀ alkyl-, C₃₋₆cycloalkyl, C₃₋₆cycloalkyl-C₁₋₁₀alkyl-, C₃₋₆cycloalkenyl, C₃₋₆cycloalkenyl-C₁₋₁₀alkyl-, C₂₋₅cycloheteroalkyl, C₃₋₆cycloheteroalkyl-C₁₋₁₀alkyl-, heteroaryl, heteroaryl-O—, and heteroaryl-C₁₋₁₀ alkyl-, wherein B is unsubstituted or substituted with one to five substituents independently selected from R^(b).

In another embodiment of the present invention, B is selected from the group consisting of: aryl, aryl-O—, aryl-C₁₋₁₀ alkyl-, C₃₋₆cycloalkyl, C₃₋₆cycloalkyl-C₁₋₁₀alkyl-, C₃₋₆cycloalkenyl, C₃₋₆cycloalkenyl-C₁₋₁₀alkyl-, C₂₋₅cycloheteroalkyl, C₃₋₆cycloheteroalkyl-C₁₋₁₀alkyl-, heteroaryl, heteroaryl-O—, and heteroaryl-C₁₋₁₀ alkyl-, wherein B is unsubstituted or substituted with one to five substituents independently selected from R^(b).

In another embodiment of the present invention, B is selected from the group consisting of: hydrogen, aryl, aryl-C₁₋₁₀ alkyl-, C₃₋₆cycloalkyl, C₃₋₆cycloalkyl-C₁₋₁₀alkyl-, C₃₋₆cycloalkenyl, C₃₋₆cycloalkenyl-C₁₋₁₀alkyl-, C₂₋₅cycloheteroalkyl, C₃₋₆cycloheteroalkyl-C₁₋₁₀alkyl-, heteroaryl, and heteroaryl-C₁₋₁₀ alkyl-, wherein B is unsubstituted or substituted with one to five substituents independently selected from R^(b). In another embodiment of the present invention, B is selected from the group consisting of: aryl, aryl-C₁₋₁₀ alkyl-, C₃₋₆cycloalkyl, C₃₋₆cycloalkyl-C₁₋₁₀alkyl-, C₃₋₆cycloalkenyl, C₃₋₆cycloalkenyl-C₁₋₁₀alkyl-, C₂₋₅cycloheteroalkyl, C₃₋₆cycloheteroalkyl-C₁₋₁₀alkyl-, heteroaryl, and heteroaryl-C₁₋₁₀ alkyl-, wherein B is unsubstituted or substituted with one to five substituents independently selected from R^(b).

In another embodiment of the present invention, B is selected from the group consisting of: hydrogen, aryl, aryl-C₁₋₁₀ alkyl-, C₃₋₆cycloalkyl, C₃₋₆cycloalkyl-C₁₋₁₀alkyl-, C₂₋₅cycloheteroalkyl, C₃₋₆cycloheteroalkyl-C₁₋₁₀alkyl-, heteroaryl, and heteroaryl-C₁₋₁₀ alkyl-, wherein B is unsubstituted or substituted with one to five substituents independently selected from R^(b).

In another embodiment of the present invention, B is selected from the group consisting of: hydrogen, aryl, aryl-C₁₋₁₀ alkyl-, heteroaryl, and heteroaryl-C₁₋₁₀ alkyl-, wherein B is unsubstituted or substituted with one to five substituents independently selected from R^(b).

In another embodiment of the present invention, B is selected from the group consisting of: hydrogen, aryl, and heteroaryl, wherein each aryl and heteroaryl is unsubstituted or substituted with one to five substituents independently selected from R^(b). In a class of this embodiment, B is selected from the group consisting of: hydrogen, phenyl, and pyridyl, wherein each phenyl and pyridyl is unsubstituted or substituted with one to five substituents independently selected from R^(b).

In another embodiment of the present invention, B is selected from the group consisting of: hydrogen and aryl, wherein each aryl is unsubstituted or substituted with one to five substituents independently selected from R^(b). In a class of this embodiment, B is hydrogen or phenyl, wherein each phenyl is unsubstituted or substituted with one to five substituents independently selected from R^(b).

In another embodiment of the present invention, B is hydrogen.

In another embodiment of the present invention, B is selected from the group consisting of: aryl, aryl-C₁₋₁₀ alkyl-, C₃₋₆cycloalkyl, C₃₋₆cycloalkyl-C₁₋₁₀alkyl-, C₂₋₅cycloheteroalkyl, C₃₋₆cycloheteroalkyl-C₁₋₁₀alkyl-, heteroaryl, and heteroaryl-C₁₋₁₀ alkyl-, wherein B is unsubstituted or substituted with one to five substituents independently selected from R^(b).

In another embodiment of the present invention, B is selected from the group consisting of: aryl, aryl-C₁₋₁₀ alkyl-, heteroaryl, and heteroaryl-C₁₋₁₀ alkyl-, wherein B is unsubstituted or substituted with one to five substituents independently selected from R^(b).

In another embodiment of the present invention, B is selected from the group consisting of: aryl, and heteroaryl, wherein each aryl and heteroaryl is unsubstituted or substituted with one to five substituents independently selected from R^(b). In a class of this embodiment, B is selected from the group consisting of: phenyl, and pyridyl, wherein each phenyl and pyridyl is unsubstituted or substituted with one to five substituents independently selected from R^(b).

In another embodiment of the present invention, B is aryl, wherein aryl is unsubstituted or substituted with one to five substituents independently selected from R^(b). In a class of this embodiment, B is phenyl, wherein phenyl is unsubstituted or substituted with one to five substituents independently selected from R^(b).

In another embodiment of the present invention, B is heteroaryl, wherein heteroaryl is unsubstituted or substituted with one to five substituents independently selected from R^(b). In a class of this embodiment, B is pyridyl, wherein pyridyl is unsubstituted or substituted with one to five substituents independently selected from R^(b). In another embodiment of the present invention, R¹ and R² are each independently selected from: a bond, hydrogen, halogen, —OR^(k), —CN, —C₁₋₆alkyl, —C₃₋₆cycloalkyl, C₃₋₆cycloalkyl-C₁₋₃alkyl-, —C₂₋₆cycloheteroalkyl, and C₂₋₆cycloheteroalkyl-C₁₋₃alkyl-, wherein each alkyl, cycloalkyl and cycloheteroalkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein one of R¹ and R² is substituted with R⁷.

In another embodiment of the present invention, R¹ and R² are each independently selected from: hydrogen, halogen, —OR^(k), —CN, —C₁₋₆alkyl, —C₃₋₆cycloalkyl, C₃₋₆cycloalkyl-C₁₋₃alkyl-, —C₂₋₆cycloheteroalkyl, and C₂₋₆cycloheteroalkyl-C₁₋₃alkyl-, wherein each alkyl, cycloalkyl and cycloheteroalkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein one of R¹ and R² is substituted with R⁷, or R¹ and R² together with the atom(s) to which they are attached form a C₃₋₆cycloalkyl ring or a C₂₋₅cycloheteroalkyl ring containing 0-2 additional heteroatoms independently selected from oxygen, sulfur and N—R^(g), wherein each R¹ and R² is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein one of R¹ and R² is substituted with R⁷.

In another embodiment of the present invention, R¹ and R² are each independently selected from: hydrogen, halogen, —OR^(k), —CN, —C₁₋₆alkyl, —C₃₋₆cycloalkyl, C₃₋₆cycloalkyl-C₁₋₃alkyl-, —C₂₋₆cycloheteroalkyl, and C₂₋₆cycloheteroalkyl-C₁₋₃alkyl-, wherein each alkyl, cycloalkyl and cycloheteroalkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein one of R¹ and R² is substituted with R⁷.

In another embodiment of the present invention, R¹ and R² are each independently selected from: hydrogen, and —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein one of R¹ and R² is substituted with R⁷, or R¹ and R² together with the atom(s) to which they are attached form a C₃₋₆cycloalkyl ring or a C₂₋₅cycloheteroalkyl ring containing 0-2 additional heteroatoms independently selected from oxygen, sulfur and N—R^(g), wherein each R¹ and R² is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein one of R¹ and R² is substituted with R⁷.

In another embodiment of the present invention, R¹ and R² are each independently selected from: hydrogen and —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein one of R¹ and R² is substituted with R⁷. In another embodiment of the present invention, R¹ and R² are each independently selected from: hydrogen, and —C₁₋₆alkyl, wherein alkyl is substituted with one or two substituents independently selected from R^(L), and wherein one of R¹ and R² is substituted with R⁷. In another embodiment of the present invention, R¹ and R² are each independently selected from: hydrogen and —C₁₋₆alkyl, wherein one of R¹ and R² is —C₁₋₆alkyl substituted with R⁷, and wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L).

In another embodiment of the present invention, R¹ and R² are each independently selected from: hydrogen, and ethyl, wherein ethyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein one of R¹ and R² is substituted with R⁷. In another embodiment of the present invention, R¹ and R² are each independently selected from: hydrogen and ethyl, wherein ethyl is substituted with one or two substituents independently selected from R^(L), and wherein one of R¹ and R² is substituted with R⁷. In another embodiment of the present invention, R¹ and R² are each independently selected from: hydrogen and ethyl, wherein one of R¹ and R² is ethyl substituted with R⁷, and wherein ethyl is unsubstituted or substituted with one to three substituents independently selected from R^(L).

In another embodiment of the present invention, R¹ and R² are each independently selected from: hydrogen, and —C₁₋₆alkyl, wherein one of R¹ and R² is —C₁₋₆alkyl substituted with R⁷, and wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L).

In another embodiment of the present invention, R² is hydrogen, and R¹ is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷. In another embodiment of the present invention, R² is hydrogen, and R¹ is ethyl, wherein ethyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷.

In another embodiment of the present invention, R² is hydrogen, and R¹ is —C₁₋₆alkyl, wherein alkyl is substituted with one or two substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷. In another embodiment of the present invention, R² is hydrogen, and R¹ is ethyl, wherein ethyl is substituted with one or two substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷.

In another embodiment of the present invention, R¹ is hydrogen, and R² is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R² is substituted with R⁷. In another embodiment of the present invention, R¹ is hydrogen, and R² is ethyl, wherein ethyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R² is substituted with R⁷.

In another embodiment of the present invention, R¹ is —CH(cyclopropyl)-CH(CH₃)—CO₂H. In another embodiment of the present invention, R¹ is —CH(cyclopropyl)-CH(CH₃)—CO₂H, and R² is hydrogen. In another embodiment of the present invention, R² is —CH(cyclopropyl)-CH(CH₃)—CO₂H. In another embodiment of the present invention, R² is —CH(cyclopropyl)-CH(CH₃)—CO₂H, and R¹ is hydrogen.

In another embodiment of the present invention, R¹ is —CH(cyclopropyl)-CH₂—CO₂H. In another embodiment of the present invention, R¹ is —CH(cyclopropyl)-CH₂—CO₂H, and R² is hydrogen. In another embodiment of the present invention, R² is —CH(cyclopropyl)-CH₂—CO₂H. In another embodiment of the present invention, R² is —CH(cyclopropyl)-CH₂—CO₂H, and R¹ is hydrogen.

In another embodiment of the present invention, R¹ is —(CH₂)₂—CO₂H. In another embodiment of the present invention, R¹ is —(CH₂)₂—CO₂H, and R² is hydrogen. In another embodiment of the present invention, R² is —(CH₂)₂—CO₂H. In another embodiment of the present invention, R² is —(CH₂)₂—CO₂H, and R¹ is hydrogen.

In another embodiment of the present invention, R¹ is hydrogen, and R² is —C₁₋₆alkyl, wherein alkyl is substituted with one or two substituents independently selected from R^(L), and wherein R² is substituted with R⁷. In another embodiment of the present invention, R¹ is hydrogen, and R² is ethyl, wherein ethyl is substituted with one or two substituents independently selected from R^(L), and wherein R² is substituted with R⁷. In another embodiment of the present invention, R¹ is selected from: a bond, hydrogen, halogen, —OR^(k), —CN, —C₁₋₆alkyl, —C₃₋₆cycloalkyl, C₃₋₆cycloalkyl-C₁₋₃alkyl-, —C₂₋₆cycloheteroalkyl, and C₂₋₆cycloheteroalkyl-C₁₋₃alkyl-, wherein each alkyl, cycloalkyl and cycloheteroalkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷.

In another embodiment of the present invention, R¹ is selected from: hydrogen, halogen, —OR^(k), —CN, —C₁₋₆alkyl, —C₃₋₆cycloalkyl, C₃₋₆cycloalkyl-C₁₋₃alkyl-, —C₂₋₆cycloheteroalkyl, and C₂₋₆cycloheteroalkyl-C₁₋₃alkyl-, wherein each alkyl, cycloalkyl and cycloheteroalkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷, or R¹ and R² together with the atom(s) to which they are attached form a C₃₋₆cycloalkyl ring or a C₂₋₅cycloheteroalkyl ring containing 0-2 additional heteroatoms independently selected from oxygen, sulfur and N—R^(g), wherein each R¹ and R² is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein one of R¹ and R² is substituted with R⁷.

In another embodiment of the present invention, R¹ is selected from: hydrogen, halogen, —OR^(k), —CN, —C₁₋₆alkyl, —C₃₋₆cycloalkyl, C₃₋₆cycloalkyl-C₁₋₃alkyl-, —C₂₋₆cycloheteroalkyl, and C₂₋₆cycloheteroalkyl-C₁₋₃alkyl-, wherein each alkyl, cycloalkyl and cycloheteroalkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷.

In another embodiment of the present invention, R¹ is selected from: hydrogen and —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷, or R¹ and R² together with the atom(s) to which they are attached form a C₃₋₆cycloalkyl ring or a C₂₋₅cycloheteroalkyl ring containing 0-2 additional heteroatoms independently selected from oxygen, sulfur and N—R^(g), wherein each R¹ and R² is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein one of R¹ and R² is substituted with R⁷.

In another embodiment of the present invention, R¹ is selected from: hydrogen and —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷.

In another embodiment of the present invention, R¹ is selected from: hydrogen and ethyl, wherein ethyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷.

In another embodiment of the present invention, R¹ is selected from: hydrogen and —C₁₋₆alkyl, wherein alkyl is substituted with one or two substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷. In another embodiment of the present invention, R¹ is selected from: hydrogen and ethyl, wherein ethyl is substituted with one or two substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷. In another embodiment of the present invention, R¹ is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷. In another embodiment of the present invention, R¹ is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one or two substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷.

In another embodiment of the present invention, R¹ is ethyl, wherein ethyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷. In another embodiment of the present invention, R¹ is ethyl, wherein ethyl is unsubstituted or substituted with one or two substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷.

In another embodiment of the present invention, R¹ is hydrogen.

In another embodiment, each R¹ is independently selected from: —C₁₋₆alkyl, —C₃₋₆cycloalkyl, C₃₋₆cycloalkyl-C₁₋₃alkyl-, —C₂₋₆cycloheteroalkyl, and C₂₋₆cycloheteroalkyl-C₁₋₃alkyl-, wherein each alkyl, cycloalkyl and cycloheteroalkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷; and R² is hydrogen.

In another embodiment of the present invention, R¹ is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷, and R² is hydrogen. In another embodiment of the present invention, R¹ is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one or two substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷, and R² is hydrogen.

In another embodiment of the present invention, R¹ is ethyl, wherein ethyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷, and R² is hydrogen. In another embodiment of the present invention, R¹ is ethyl, wherein ethyl is unsubstituted or substituted with one or two substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷, and R² is hydrogen.

In another embodiment of the present invention, R² is selected from: a bond, hydrogen, halogen, —OR^(k), —CN, —C₁₋₆alkyl, —C₃₋₆cycloalkyl, C₃₋₆cycloalkyl-C₁₋₃alkyl-, —C₂₋₆cycloheteroalkyl, and C₂₋₆cycloheteroalkyl-C₁₋₃alkyl-, wherein each alkyl, cycloalkyl and cycloheteroalkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R² is substituted with R⁷.

In another embodiment of the present invention, R² is selected from: hydrogen, halogen, —OR^(k), —CN, —C₁₋₆alkyl, —C₃₋₆cycloalkyl, —C₃₋₆cycloalkyl-C₁₋₃alkyl-, —C₂₋₆cycloheteroalkyl, and C₂₋₆cycloheteroalkyl-C₁₋₃alkyl-, wherein each alkyl, cycloalkyl and cycloheteroalkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R² is substituted with R⁷, or R¹ and R² together with the atom(s) to which they are attached form a C₃₋₆cycloalkyl ring or a C₂₋₅cycloheteroalkyl ring containing 0-2 additional heteroatoms independently selected from oxygen, sulfur and N—R^(g), wherein each R¹ and R² is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein one of R¹ and R² is substituted with R⁷.

In another embodiment of the present invention, R² is selected from: hydrogen, halogen, —OR^(k), —CN, —C₁₋₆alkyl, —C₃₋₆cycloalkyl, C₃₋₆cycloalkyl-C₁₋₃alkyl-, —C₂₋₆cycloheteroalkyl, and C₂₋₆cycloheteroalkyl-C₁₋₃alkyl-, wherein each alkyl, cycloalkyl and cycloheteroalkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R² is substituted with R⁷.

In another embodiment of the present invention, R² is selected from: hydrogen and —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R² is substituted with R⁷, or R¹ and R² together with the atom(s) to which they are attached form a C₃₋₆cycloalkyl ring or a C₂₋₅cycloheteroalkyl ring containing 0-2 additional heteroatoms independently selected from oxygen, sulfur and N—R^(g), wherein each R¹ and R² is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein one of R¹ and R² is substituted with R⁷.

In another embodiment of the present invention, R² is selected from: hydrogen and —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R² is substituted with R⁷.

In another embodiment of the present invention, R² is selected from: hydrogen and ethyl, wherein ethyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R² is substituted with R⁷.

In another embodiment of the present invention, R² is selected from: hydrogen and —C₁₋₆alkyl, wherein alkyl is substituted with one or two substituents independently selected from R^(L), and wherein R² is substituted with R⁷. In another embodiment of the present invention, R² is selected from: hydrogen and ethyl, wherein ethyl is substituted with one or two substituents independently selected from R^(L), and wherein R² is substituted with R⁷.

In another embodiment of the present invention, R² is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R² is substituted with R⁷. In another embodiment of the present invention, R² is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one or two substituents independently selected from R^(L), and wherein R² is substituted with R⁷.

In another embodiment of the present invention, R² is ethyl, wherein ethyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R² is substituted with R⁷. In another embodiment of the present invention, R² is ethyl, wherein ethyl is unsubstituted or substituted with one or two substituents independently selected from R^(L), and wherein R² is substituted with R⁷.

In another embodiment of the present invention, R² is hydrogen.

In another embodiment, each R² is independently selected from: —C₁₋₆alkyl, —C₃₋₆cycloalkyl, C₃₋₆cycloalkyl-C₁₋₃alkyl-, —C₂₋₆cycloheteroalkyl, and C₂₋₆cycloheteroalkyl-C₁₋₃alkyl-, wherein each alkyl, cycloalkyl and cycloheteroalkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R² is substituted with R⁷; and R¹ is hydrogen.

In another embodiment of the present invention, R² is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R² is substituted with R⁷, and R¹ is hydrogen. In another embodiment of the present invention, R² is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one or two substituents independently selected from R^(L), and wherein R² is substituted with R⁷, and R¹ is hydrogen.

In another embodiment of the present invention, R² is ethyl, wherein ethyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R² is substituted with R⁷, and R¹ is hydrogen. In another embodiment of the present invention, R² is ethyl, wherein ethyl is unsubstituted or substituted with one or two substituents independently selected from R^(L), and wherein R² is substituted with R⁷, and R¹ is hydrogen.

In one class of the embodiments of the present invention, at least one of R¹ and R² is selected from: —C₁₋₆alkyl, —C₃₋₆cycloalkyl, C₃₋₆cycloalkyl-C₁₋₃alkyl-, —C₂₋₆cycloheteroalkyl, and C₂₋₆cycloheteroalkyl-C₁₋₃alkyl-.wherein each alkyl, cycloalkyl and cycloheteroalkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein one alkyl, cycloalkyl or cycloheteroalkyl is substituted with R⁷. In another class of the embodiments of the present invention, one of R¹ and R² is selected from: —C₁₋₆alkyl, —C₃₋₆cycloalkyl, C₃₋₆cycloalkyl-C₁₋₃alkyl-, —C₂₋₆cycloheteroalkyl, and C₂₋₆cycloheteroalkyl-C₁₋₃alkyl-, wherein each alkyl, cycloalkyl and cycloheteroalkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein one alkyl, cycloalkyl or cycloheteroalkyl is substituted with R⁷. In another class of the embodiments of the present invention, at least one of R¹ and R² is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein one alkyl is substituted with R⁷. In another class of the embodiments of the present invention, one of R¹ and R² is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein alkyl is substituted with R⁷. In another class of the embodiments of the present invention, one of R¹ and R² is —C₁₋₆alkyl, wherein alkyl is substituted with one or two substituents independently selected from R^(L), and wherein alkyl is substituted with R⁷. In another class of the embodiments of the present invention, at least one of R¹ and R² is ethyl, wherein ethyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein one ethyl is substituted with R⁷. In another class of the embodiments of the present invention, one of R¹ and R² is ethyl, wherein ethyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein ethyl is substituted with R⁷. In another class of the embodiments of the present invention, one of R¹ and R² is ethyl, wherein ethyl is substituted with one or two substituents independently selected from R^(L), and wherein ethyl is substituted with R⁷.

In another embodiment of the present invention, R³ is absent or if present R³ is selected from the group consisting of: hydrogen, halogen, —OR^(e), —CN, and —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(i). In another embodiment of the present invention, R³ is absent or if present R³ is selected from the group consisting of: hydrogen, halogen, and —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(i). In another embodiment of the present invention, R³ is absent or if present R³ is selected from the group consisting of: hydrogen and —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(i). In another embodiment of the present invention, R³ is absent or if present R³ is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(i). In another embodiment of the present invention, R³ is absent or hydrogen. In another embodiment of the present invention, R³ is absent. In another embodiment of the present invention, R³ is hydrogen. In another embodiment of the present invention, R⁴ is selected from the group consisting of: hydrogen, halogen, OR^(e), —C₀₋₅alkylNR^(c)R^(d), —C₁₋₆alkyl, and —C₁₋₆alkyl-O—, wherein each alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(j). In another embodiment of the present invention, R⁴ is selected from the group consisting of: hydrogen and —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(j). In another embodiment of the present invention, R⁴ is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(j). In another embodiment of the present invention, R⁴ is hydrogen.

In another embodiment of the present invention, R⁵ is absent or if present R⁵ is selected from the group consisting of: hydrogen and —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(j). In another embodiment of the present invention, R⁵ is absent or if present R⁵ is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(j). In another embodiment of the present invention, R⁵ is absent or if present R⁵ is hydrogen. In another embodiment of the present invention, R⁵ is absent or hydrogen. In another embodiment of the present invention, R⁵ is absent. In another embodiment of the present invention, R⁵ is hydrogen. In another embodiment of the present invention, R⁶ is absent or if present R⁶ is selected from the group consisting of: hydrogen and —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(j). In another embodiment of the present invention, R⁶ is absent or if present R⁶ is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(j). In another embodiment of the present invention, R⁶ is absent or if present R⁶ is hydrogen. In another embodiment of the present invention, R⁶ is absent or hydrogen. In another embodiment of the present invention, R⁶ is absent. In another embodiment of the present invention, R⁶ is hydrogen.

In another embodiment of the present invention, R⁷ is —CO₂R⁸. In a class of this embodiment, R⁷ is —CO₂H.

In another embodiment of the present invention, R⁸ is selected from the group consisting of: hydrogen and —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(j). In another embodiment of the present invention, R⁸ is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(j). In another embodiment of the present invention, R⁸ is hydrogen.

In another embodiment of the present invention, R^(a) is selected from the group consisting of:

—C₁₋₆alkyl, halogen, —C₀₋₆alkyl-OR^(e), —C₀₋₆alkyl-NR^(c)S(O)_(n)R^(e), —C₀₋₆alkyl-S(O)_(n)R^(e), —C₀₋₆alkyl-S(O)_(n)NR^(c)R^(d), —C₀₋₆alkyl-NR^(c)R^(d), —C₀₋₆alkyl-C(O)R^(e), —C₀₋₆alkyl-OC(O)R^(e), —C₀₋₆alkyl-CO₂R^(e), —C₀₋₆alkyl-CN, —C₀₋₆alkyl-C(O)NR^(c)R^(d), —C₀₋₆alkyl-NR^(c)C(O)R^(e), —C₀₋₆alkyl-NR^(c)C(O)OR^(e), —C₀₋₆alkyl-NR^(c)C(O)NR^(c)R^(d), —CF₃, —OCF₃, and —OCHF₂, wherein each alkyl is unsubstituted or substituted with one to five substituents independently selected from: —C₁₋₆alkyl, halogen, OH, —O—C₁₋₆alkyl, —S(O)₂—C₁₋₄alkyl, —CN, —OCHF₂, —OCF₃, —CF₃, and —C₀₋₆alkyl-NR^(c)R^(d). In another embodiment of the present invention, R^(a) is selected from the group consisting of: —C₁₋₆alkyl, halogen, —OR^(e), —C₀₋₆alkyl-NR^(c)R^(d), —CN, —CF₃, —OCF₃, and —OCHF₂, wherein each alkyl is unsubstituted or substituted with one to five substituents independently selected from: —C₁₋₆alkyl, halogen, OH, —O—C₁₋₆alkyl and —CF₃. In another embodiment of the present invention, R^(a) is selected from the group consisting of: —C₁₋₆alkyl, halogen, —CN, —CF₃, —OCF₃, and —OCHF₂, wherein each alkyl is unsubstituted or substituted with one to five substituents independently selected from: —C₁₋₆alkyl, halogen, OH, —O—C₁₋₆alkyl and —CF₃. In another embodiment of the present invention, R^(a) is selected from the group consisting of: halogen and —CF₃. In another embodiment of the present invention, R^(a) is halogen. In a class of this embodiment, R^(a) is F. In another embodiment of the present invention, R^(a) is —CF₃.

In another embodiment of the present invention, R^(b) is independently selected from the group consisting of: —C₁₋₁₀alkyl, —C₂₋₁₀alkenyl, —CF₃, halogen, —CN, —OH, —OC₁₋₁₀alkyl, —OC₂₋₁₀alkenyl, —O(CH₂)pNR^(c)S(O)_(m)R^(e), —O(CH₂)pS(O)_(m)R^(e), —O(CH₂)pS(O)_(m)NR^(c)R^(d), —O(CH₂)pNR^(c)R^(d), —C(O)R^(e), —OC(O)R^(e), —CO₂R^(e), —C(O)NR^(c)R^(d), —NR^(c)C(O)R^(e), —NR^(c)C(O)OR^(e), —NR^(c)C(O)NR^(c)R^(d), —OCF₃, and —OCHF₂, wherein each CH, CH₂, alkyl, and alkenyl is unsubstituted or substituted with one to five substituents independently selected from: —C₁₋₆alkyl, halogen, OH, —O—C₁₋₆alkyl and —CF₃. In another embodiment of the present invention, R^(b) is independently selected from the group consisting of: —C₁₋₁₀alkyl, —CF₃, halogen, —CN, —OH, —OC₁₋₁₀alkyl, —OCF₃, and —OCHF₂, wherein each CH, and alkyl is unsubstituted or substituted with one to five substituents independently selected from: —C₁₋₆alkyl, halogen, OH, —O—C₁₋₆alkyl and —CF₃.

In another embodiment of the present invention, R^(b) is independently selected from the group consisting of: —CF₃, halogen, and —OC₁₋₁₀alkyl. In a class of this embodiment, each R^(b) is independently selected from the group consisting of: —CF₃, F, C₁ and —OCH₃. In another embodiment of the present invention, R^(b) is independently selected from the group consisting of: —C₁₋₁₀ alkyl, halogen, and —OC₁₋₁₀alkyl, wherein each alkyl is unsubstituted or substituted with one to five substituents independently selected from: —C₁₋₆alkyl, halogen, OH, —O—C₁₋₆alkyl and —CF₃. In a class of this embodiment, R^(b) is independently selected from the group consisting of: —CH₃, F, C₁, and —OCH₃, wherein each alkyl is unsubstituted or substituted with one to five substituents independently selected from: —C₁₋₆alkyl, halogen, OH, —O—C₁₋₆alkyl and —CF₃.

In another embodiment of the present invention, R^(b) is independently selected from the group consisting of: halogen and —OC₁₋₁₀alkyl, wherein alkyl is unsubstituted or substituted with one to five substituents independently selected from: —C₁₋₆alkyl, halogen, OH, —O—C₁₋₆alkyl and —CF₃. In a class of this embodiment, R^(b) is independently selected from the group consisting of: halogen and —OC₁₋₁₀alkyl. In another class of this embodiment, each R^(b) is independently selected from the group consisting of: F, C₁, and —OCH₃. In another class of this embodiment, each R^(b) is independently selected from the group consisting of: F, and —OCH₃.

In another embodiment of the present invention, R^(c) and R^(d) are each independently selected from the group consisting of: hydrogen, C₁₋₁₀alkyl, and C₂₋₁₀alkenyl, wherein each alkyl, and alkenyl is unsubstituted or substituted with one to three substituents independently selected from R^(f), or R^(c) and R^(d) together with the atom(s) to which they are attached form a C₂₋₁₀cycloheteroalkyl ring containing 0-2 additional heteroatoms independently selected from oxygen, sulfur and N—R^(g), wherein each R^(c) and R^(d) is unsubstituted or substituted with one to three substituents independently selected from R^(f). In a class of this embodiment, R^(c) and R^(d) are each independently selected from the group consisting of: hydrogen and C₁₋₁₀alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(f), or R^(c) and R^(d) together with the atom(s) to which they are attached form a C₂₋₁₀cycloheteroalkyl ring containing 0-2 additional heteroatoms independently selected from oxygen, sulfur and N—R^(g), wherein each R^(c) and R^(d) is unsubstituted or substituted with one to three substituents independently selected from R^(f).

In another embodiment of the present invention, R^(c) and R^(d) are each independently selected from the group consisting of: hydrogen, C₁₋₁₀alkyl, and C₂₋₁₀alkenyl, wherein each alkyl, and alkenyl is unsubstituted or substituted with one to three substituents independently selected from R^(f). In a class of this embodiment, R^(c) and R^(d) are each independently selected from the group consisting of: hydrogen and —C₁₋₁₀alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(f).

In another embodiment of the present invention, R^(c) and R^(d) are hydrogen.

In another embodiment of the present invention, R^(c) and R^(d) are —C₁₋₁₀alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(f).

In another embodiment of the present invention, R^(c) is selected from the group consisting of: hydrogen, C₁₋₁₀alkyl, and C₂₋₁₀alkenyl, wherein each alkyl, and alkenyl is unsubstituted or substituted with one to three substituents independently selected from R^(f), or R^(c) and R^(d) together with the atom(s) to which they are attached form a C₂₋₁₀ cycloheteroalkyl ring containing 0-2 additional heteroatoms independently selected from oxygen, sulfur and N—R^(g), wherein each R^(c) and R^(d) is unsubstituted or substituted with one to three substituents independently selected from R^(f). In a class of this embodiment, R^(c) is selected from the group consisting of: hydrogen and C₁₋₁₀alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(f), or R^(c) and R^(d) together with the atom(s) to which they are attached form a C₂₋₁₀cycloheteroalkyl ring containing 0-2 additional heteroatoms independently selected from oxygen, sulfur and N—R^(g), wherein each R^(c) and R^(d) is unsubstituted or substituted with one to three substituents independently selected from R^(f).

In another embodiment of the present invention, R^(c) is selected from the group consisting of: hydrogen, C₁₋₁₀alkyl, and C₂₋₁₀alkenyl, wherein each alkyl and alkenyl is unsubstituted or substituted with one to three substituents independently selected from R^(f). In a class of this embodiment, R^(c) is selected from the group consisting of: hydrogen and —C₁₋₁₀alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(f).

In another embodiment of the present invention, R^(c) is hydrogen. In another embodiment of the present invention, R^(c) is —C₁₋₁₀alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(f).

In another embodiment of the present invention, R^(d) is selected from the group consisting of: hydrogen, C₁₋₁₀alkyl, and C₂₋₁₀alkenyl, wherein each alkyl, and alkenyl is unsubstituted or substituted with one to three substituents independently selected from R^(f), or R^(c) and R^(d) together with the atom(s) to which they are attached form a C₂₁₀ cycloheteroalkyl ring containing 0-2 additional heteroatoms independently selected from oxygen, sulfur and N—R^(g), wherein each R^(c) and R^(d) is unsubstituted or substituted with one to three substituents independently selected from R^(f). In a class of this embodiment, R^(d) is selected from the group consisting of: hydrogen and C₁₋₁₀alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(f), or R^(c) and R^(d) together with the atom(s) to which they are attached form a C₂₋₁₀ cycloheteroalkyl ring containing 0-2 additional heteroatoms independently selected from oxygen, sulfur and N—R^(g), wherein each R^(c) and R^(d) is unsubstituted or substituted with one to three substituents independently selected from R^(f).

In another embodiment of the present invention, R^(d) is selected from the group consisting of: hydrogen, C₁₋₁₀alkyl, and C₂₋₁₀alkenyl, wherein each alkyl and alkenyl is unsubstituted or substituted with one to three substituents independently selected from R^(f). In a class of this embodiment, R^(d) is selected from the group consisting of: hydrogen and —C₁₋₁₀alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(f).

In another embodiment of the present invention, R^(d) is hydrogen.

In another embodiment of the present invention, R^(d) is C₁₋₁₀alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(f).

In another embodiment of the present invention, each R^(e) is independently selected from the group consisting of: hydrogen, —C₁₋₁₀alkyl, and —C₂₋₁₀ alkenyl, wherein each alkyl and alkenyl is unsubstituted or substituted with one to three substituents independently selected from R^(h).

In another embodiment of the present invention, each R^(e) is independently selected from the group consisting of: hydrogen and —C₁₋₁₀alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(h). In another embodiment of the present invention, each R^(e) is hydrogen. In another embodiment of the present invention, each R^(e) is —C₁₋₁₀alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(h).

In another embodiment of the present invention, each R^(f) is selected from the group consisting of: halogen, —C₁₋₁₀alkyl, —OH, —O—C₁₋₄alkyl, —CN, —CF₃, —OCHF₂, and —OCF₃, wherein each alkyl is unsubstituted or substituted with one to three substituents independently selected from: —OH, halogen, C₁₋₆alkyl, cyano and S(O)₂C₁₋₆alkyl. In another embodiment of the present invention, each R^(f) is selected from the group consisting of: halogen and —C₁₋₁₀alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from: —OH, halogen, C₁₋₆alkyl, cyano and S(O)₂C₁₋₆alkyl. In another embodiment of the present invention, each R^(f) is C₁₋₁₀alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from: —OH, halogen, C₁₋₆alkyl, cyano and S(O)₂C₁₋₆alkyl. In a class of this embodiment, each R^(f) is C₁₋₁₀alkyl.

In another embodiment of the present invention, each R^(g) is selected from the group consisting of: hydrogen and —C₁₋₁₀alkyl, wherein alkyl is unsubstituted or substituted with one to five halogens. In another embodiment of the present invention, R^(g) is hydrogen. In another embodiment of the present invention, each R^(g) is —C₁₋₁₀alkyl, wherein each alkyl is unsubstituted or substituted with one to five halogens.

In another embodiment of the present invention, each R^(h) is selected from the group consisting of: halogen, —C₁₋₁₀alkyl, —OH, —O—C₁₋₄alkyl, —CN, —CF₃, —OCHF₂, and —OCF₃, wherein each alkyl is unsubstituted or substituted with one to three substituents independently selected from: —OH, halogen, C₁₋₆alkyl, cyano and S(O)₂C₁₋₆alkyl. In another embodiment of the present invention, each R^(h) is selected from the group consisting of: halogen and —C₁₋₁₀alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from: —OH, halogen, C₁₋₆alkyl, cyano and S(O)₂C₁₋₆alkyl. In another embodiment of the present invention, each R^(h) is C₁₋₁₀alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from: —OH, halogen, C₁₋₆alkyl, cyano and S(O)₂C₁₋₆alkyl. In a class of this embodiment, each R^(h) is C₁₋₁₀alkyl.

In another embodiment of the present invention, each R¹ is independently selected from the group consisting of: —C₁₋₆alkyl, —OR^(e), halogen, —S(O)_(m)R^(e), —NR^(c)R^(d), —C(O)R^(e), —OC(O)R^(e), —CO₂R^(e), —CN, —CF₃, —OCF₃, and —OCHF₂. In another embodiment of the present invention, each R^(i) is independently selected from the group consisting of: —C₁₋₆alkyl, —OR^(e), halogen, —NR^(c)R^(d), —CN, —CF₃, —OCF₃, and —OCHF₂. In another embodiment of the present invention, each R¹ is independently selected from the group consisting of: —C₁₋₆alkyl, halogen, —CN, —CF₃, —OCF₃, and —OCHF₂. In another embodiment of the present invention, each R¹ is independently selected from the group consisting of: —C₁₋₆alkyl and halogen. In another embodiment of the present invention, each R¹ is —C₁₋₆alkyl.

In another embodiment of the present invention, each R^(j) is independently selected from the group consisting of: —C₁₋₆alkyl, —OR^(e), halogen, —S(O)_(m)R^(e), —NR^(c)R^(d), —C(O)R^(e), —OC(O)R^(e), —CO₂R^(e), —CN, —CF₃, —OCF₃, and —OCHF₂. In another embodiment of the present invention, each R¹ is independently selected from the group consisting of: —C₁₋₆alkyl, —OR^(e), halogen, —NR^(c)R^(d), —CN, —CF₃, —OCF₃, and —OCHF₂. In another embodiment of the present invention, each R^(j) is independently selected from the group consisting of: —C₁₋₆alkyl, halogen, —CN, —CF₃, —OCF₃, and —OCHF₂. In another embodiment of the present invention, each R^(j) is independently selected from the group consisting of: —C₁₋₆alkyl and halogen. In another embodiment of the present invention, each R^(j) is —C₁₋₆alkyl.

In another embodiment of the present invention, each R^(k) is independently selected from the group consisting of: hydrogen, —C₁₋₆alkyl, —C₁₋₆alkyl-SO₂C₁₋₆alkyl, —CF₃, and —CHF₂, wherein each alkyl is unsubstituted or substituted with one to three substituents independently selected from: —OH, —OC₁₋₆alkyl, halogen, cyano, and —S(O)₂C₁₋₆alkyl.

In another embodiment of the present invention, each R^(k) is independently selected from the group consisting of: hydrogen, —C₁₋₆alkyl, —CF₃, and —CHF₂, wherein each alkyl is unsubstituted or substituted with one to three substituents independently selected from: —OH, —OC₁₋₆alkyl, halogen, cyano, and —S(O)₂C₁₋₆alkyl. In another embodiment of the present invention, each R^(k) is independently selected from the group consisting of: hydrogen and —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from: —OH, —OC₁₋₆alkyl, halogen, cyano, and —S(O)₂C₁₋₆alkyl. In another embodiment of the present invention, each R^(k) is hydrogen. In another embodiment of the present invention, each R^(k) is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from: —OH, —OC₁₋₆alkyl, halogen, cyano, and —S(O)₂C₁₋₆alkyl. In another embodiment of the present invention, each R^(k) is —C₁₋₆alkyl.

In another embodiment of the present invention, each R^(L) is independently selected from the group consisting of: —CO₂C₁₋₆alkyl, —C₁₋₁₀alkyl, —C₂₋₁₀ alkenyl, —C₂₋₁₀alkynyl, —C₃₋₆cycloalkyl, and —C₂₋₆cycloheteroalkyl, wherein each alkyl, alkenyl, alkynyl, cycloalkyl, and cycloheteroalkyl is unsubstituted or substituted with one to four substituents independently selected from C₁₋₆alkyl, halogen, and —OC₁₋₆alkyl. In another embodiment of the present invention, each R^(L) is independently selected from the group consisting of: —C₁₋₁₀alkyl, and —C₃₋₆cycloalkyl, wherein each alkyl, and cycloalkyl is unsubstituted or substituted with one to four substituents independently selected from C₁₋₆alkyl, halogen, and —OC₁₋₆alkyl. In a class of this embodiment, each R^(L) is independently selected from the group consisting of: —CH₃, and cyclopropyl, wherein each —CH₃ and cyclopropyl is unsubstituted or substituted with one to four substituents independently selected from C₁₋₆alkyl, halogen, and —OC₁₋₆alkyl. In another embodiment of the present invention, each R^(L) is independently selected from the group consisting of: —C₁₋₁₀alkyl, and —C₃₋₆cycloalkyl. In a class of this embodiment, each R^(L) is independently selected from the group consisting of: —CH₃, and cyclopropyl.

In another embodiment of the present invention, each R^(L) is —C₁₋₁₀alkyl, wherein alkyl is unsubstituted or substituted with one to four substituents independently selected from C₁₋₆alkyl, halogen, and —OC₁₋₆alkyl. In a class of this embodiment, each R^(L) is —CH₃, wherein —CH₃ is unsubstituted or substituted with one to three substituents independently selected from C₁₋₆alkyl, halogen, and —OC₁₋₆alkyl. In a class of this embodiment, each R^(L) is —CH₃.

In another embodiment of the present invention, each R^(L) is —C₃₋₆cycloalkyl, wherein cycloalkyl is unsubstituted or substituted with one to four substituents independently selected from C₁₋₆alkyl, halogen, and —OC₁₋₆alkyl. In a class of this embodiment, each R^(L) is cyclopropyl, wherein cyclopropyl is unsubstituted or substituted with one to four substituents independently selected from C₁₋₆alkyl, halogen, and —OC₁₋₆alkyl. In another class of this embodiment, each R^(L) is cyclopropyl.

In another embodiment of the present invention, each R^(m) is independently selected from the group consisting of: —C₁₋₁₀alkyl, —C₂₋₁₀ alkenyl, —C₃₋₆ cycloalkyl, —C₂₋₅cycloheteroalkyl, aryl, and heteroaryl. In another embodiment of the present invention, each R^(m) is independently selected from the group consisting of: —C₁₋₁₀alkyl and —C₂₋₁₀ alkenyl. In another embodiment of the present invention, each R^(m) is —C₁₋₁₀alkyl.

In another embodiment of the present invention, n is 0, 1 or 2. In a class of this embodiment, n is 0 or 1. In another class of this embodiment, n is 1 or 2. In another class of this embodiment, n is 0. In another class of this embodiment, n is 1. In another class of this embodiment, n is 2.

In another embodiment of the present invention, m is 0, 1 or 2. In a class of this embodiment, m is 0 or 1. In another class of this embodiment, m is 1 or 2. In another class of this embodiment, m is 0. In another class of this embodiment, m is 1. In another class of this embodiment, m is 2.

In another embodiment of the present invention, each p is independently selected from: 0, 1, 2, 3, 4, 5 or 6. In another embodiment of the present invention, p is 0, 1, 2, 3 or 4. In a class of this embodiment, p is 0, 1, 2 or 3. In a class of this embodiment, p is 0, 1 or 2. In another embodiment of the present invention, p is 1, 2, 3 or 4. In a class of this embodiment, p is 1, 2 or 3. In a class of this embodiment, p is 1 or 2. In another class of this embodiment, p is 0 or 1.

In another class of this embodiment, p is 0 or 2. In another class of this embodiment, p is 0. In another class of this embodiment, p is 1. In another class of this embodiment, p is 2. In another class of this embodiment, p is 3. In another class of this embodiment, p is 4. In another class of this embodiment, p is 5. In another class of this embodiment, p is 6.

In another embodiment of the present invention, each r is independently selected from: 0, 1, 2 or 3. In a class of this embodiment, r is 0, 1 or 2. In another class of this embodiment, r is 1, 2 or 3. In a class of this embodiment, r is 1 or 2. In another class of this embodiment, r is 0 or 1.

In another class of this embodiment, r is 0 or 2. In another class of this embodiment, r is 0 or 1. In another class of this embodiment, r is 1 or 3. In another class of this embodiment, r is 2 or 3. In another class of this embodiment, r is 0 or 2. In another class of this embodiment, r is 0. In another class of this embodiment, r is 1. In another class of this embodiment, r is 2. In another class of this embodiment, r is 3.

In another embodiment of the present invention, the invention relates to compounds of structural formula Ia:

or a pharmaceutically acceptable salt thereof.

In another embodiment of the present invention, the invention relates to compounds of structural formula Ib:

or a pharmaceutically acceptable salt thereof.

In another embodiment of the present invention, the invention relates to compounds of structural formula Ic:

or a pharmaceutically acceptable salt thereof.

In another embodiment of the present invention, the invention relates to compounds of structural formula Id:

or a pharmaceutically acceptable salt thereof.

In another embodiment of the present invention, the invention relates to compounds of structural formula Ie:

or a pharmaceutically acceptable salt thereof.

In another embodiment of the present invention, the invention relates to compounds of structural formula If:

or a pharmaceutically acceptable salt thereof.

In another embodiment of the present invention, the invention relates to compounds of structural formula Ig:

or a pharmaceutically acceptable salt thereof.

In another embodiment of the present invention, the invention relates to compounds of structural formula Ih:

or a pharmaceutically acceptable salt thereof.

In another embodiment of the present invention, the invention relates to compounds of structural formula Ii:

or a pharmaceutically acceptable salt thereof.

In another embodiment of the present invention, the invention relates to compounds of structural formula Ij:

or a pharmaceutically acceptable salt thereof.

In another embodiment of the present invention, the invention relates to compounds of structural formula Ik:

or a pharmaceutically acceptable salt thereof.

In another embodiment of the present invention, the invention relates to compounds of structural formula Il:

or a pharmaceutically acceptable salt thereof.

Another embodiment of the present invention relates to compounds of structural formula Im:

or a pharmaceutically acceptable salt thereof.

In another embodiment of the present invention, the invention relates to compounds of structural formula In:

or a pharmaceutically acceptable salt thereof.

The compound of structural formula I includes the compounds of structural formulas Ia, Ib, Ic, Id, Ie, If, Ig, Ih, Ii, Ij, Ik, Il, Im and In, and pharmaceutically acceptable salts, hydrates and solvates thereof.

In another embodiment of the present invention, the invention relates to compounds of structural formula I:

wherein

T is CH; U is CR¹; V is CR²; W is CH;

X is oxygen; A is selected from the group consisting of:

(1) aryl,

(2) C₁₋₆alkyl-aryl, and

(3) heteroaryl,

wherein A is unsubstituted or substituted with one to five substituents independently selected from R^(a); B is selected from the group consisting of:

(1) hydrogen,

(2) aryl, and

(3) heteroaryl,

wherein each aryl and heteroaryl is unsubstituted or substituted with one to five substituents independently selected from R^(b); R¹ and R² are each independently selected from:

(1) hydrogen, and

(2) —C₁₋₆alkyl,

wherein one of R¹ and R² is —C₁₋₆alkyl substituted with R⁷, and wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R; R³ is absent or hydrogen; R⁴ is hydrogen; R⁵ is absent or hydrogen; R⁶ is absent or hydrogen; R⁷ is —CO₂R⁸; and R⁸ is hydrogen; or a pharmaceutically acceptable salt thereof.

In another embodiment of the present invention, the invention relates to compounds of structural formula I:

wherein

T is CH; U is CR¹; V is CR²; W is CH;

X is oxygen; A is selected from the group consisting of:

(1) aryl,

(2) C₁₋₆alkyl-aryl, and

(3) heteroaryl,

wherein A is unsubstituted or substituted with one to five substituents independently selected from R^(a); B is selected from the group consisting of:

(1) aryl, and

(2) heteroaryl,

wherein each aryl and heteroaryl is unsubstituted or substituted with one to five substituents independently selected from R^(b); R¹ is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷; R² is hydrogen; R³ is absent or hydrogen; R⁴ is hydrogen; R⁵ is absent or hydrogen; R⁶ is absent or hydrogen; R⁷ is —CO₂R⁸; and R⁸ is hydrogen; or a pharmaceutically acceptable salt thereof.

In another embodiment of the present invention, the invention relates to compounds of structural formula Im:

wherein A is selected from the group consisting of:

(1) aryl,

(2) C₁₋₆alkyl-aryl, and

(3) heteroaryl,

wherein A is unsubstituted or substituted with one to five substituents independently selected from R^(a); B is selected from the group consisting of:

(1) aryl, and

(2) heteroaryl,

wherein each aryl and heteroaryl is unsubstituted or substituted with one to five substituents independently selected from R^(b); R¹ is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷; R² is hydrogen; R⁴ is hydrogen; R⁵ is hydrogen; R⁶ is hydrogen; R⁷ is —CO₂R⁸; R⁸ is hydrogen; and R^(L) is selected from the group consisting of: —C₁₋₁₀alkyl, and —C₃₋₆cycloalkyl; or a pharmaceutically acceptable salt thereof.

In another embodiment of the present invention, the invention relates to compounds of structural formula In:

wherein A is selected from the group consisting of:

(1) aryl, and

(2) heteroaryl,

wherein A is unsubstituted or substituted with one to five substituents independently selected from R^(a); B is selected from the group consisting of:

(1) hydrogen, and

(2) aryl,

wherein each aryl is unsubstituted or substituted with one to five substituents independently selected from R^(b); R¹ is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷; R² is hydrogen; R⁴ is hydrogen; R⁵ is hydrogen; R⁶ is hydrogen; R⁷ is —CO₂R⁸; R⁸ is hydrogen; and R^(L) is selected from the group consisting of: —C₁₋₁₀alkyl, and —C₃₋₆cycloalkyl; or a pharmaceutically acceptable salt thereof.

Illustrative, but non-limiting, examples of the compounds of the present invention that are useful as agonists of G-protein-coupled receptor 40 (GPR40) are the following compounds:

and pharmaceutically acceptable salts thereof.

Although the specific stereochemistries described above are preferred, other stereoisomers, including diastereoisomers, enantiomers, epimers, and mixtures of these may also have utility in treating GPR40 mediated diseases.

Synthetic methods for making the compounds are disclosed in the Examples shown below. Where synthetic details are not provided in the examples, the compounds are readily made by a person of ordinary skill in the art of medicinal chemistry or synthetic organic chemistry by applying the synthetic information provided herein. Where a stereochemical center is not defined, the structure represents a mixture of stereoisomers at that center. For such compounds, the individual stereoisomers, including enantiomers, diastereoisomers, and mixtures of these are also compounds of the invention.

Definitions

“Ac” is acetyl, which is CH₃C(═O)—.

“Alkyl” means saturated carbon chains which may be linear or branched or combinations thereof, unless the carbon chain is defined otherwise. Other groups having the prefix “alk”, such as alkoxy and alkanoyl, also may be linear or branched, or combinations thereof, unless the carbon chain is defined otherwise. The term —C₂alkyl is ethyl. Examples of alkyl groups include methyl, ethyl, propyl, isopropyl, butyl, sec- and tert-butyl, pentyl, hexyl, heptyl, octyl, nonyl, and the like. In one embodiment of the present invention, alkyl is methyl. In another embodiment of the present invention, alkyl is ethyl.

“Alkenyl” means carbon chains which contain at least one carbon-carbon double bond, and which may be linear or branched, or combinations thereof, unless otherwise defined. Examples of alkenyl include vinyl, allyl, isopropenyl, pentenyl, hexenyl, heptenyl, 1-propenyl, 2-butenyl, 2-methyl-2-butenyl, and the like.

“Alkynyl” means carbon chains which contain at least one carbon-carbon triple bond, and which may be linear or branched, or combinations thereof, unless otherwise defined. Examples of alkynyl include ethynyl, propargyl, 3-methyl-1-pentynyl, 2-heptynyl and the like.

“Cycloalkyl” means a saturated monocyclic, bicyclic or bridged carbocyclic ring, having a specified number of carbon atoms. The term may also be used to describe a carbocyclic ring fused to an aryl group. Examples of cycloalkyl include cyclopropyl, cyclopentyl, cyclohexyl, cycloheptyl, and the like. In one embodiment of the present invention, cycloalkyl is selected from: cyclopropyl.

“Cycloalkenyl” means a nonaromatic monocyclic or bicyclic carbocylic ring containing at least one double bond. Examples of cycloalkenyl include cyclopropenyl, cyclobutenyl, cyclopentenyl, cyclohexenyl, cycloheptenyl, cyclooxtenyl and the like.

“Cycloheteroalkyl” means a saturated monocyclic, bicyclic or bridged carbocyclic ring or ring system containing at least one ring heteroatom selected from N, NH, S (including SO and SO₂) and O. The cycloheteroalkyl ring may be substituted on the ring carbons and/or the ring nitrogen(s). Examples of cycloheteroalkyl include tetrahydrofuran, pyrrolidine, tetrahydrothiophene, azetidine, piperazine, piperidine, morpholine, oxetane and tetrahydropyran.

“Cycloheteroalkenyl” means a nonaromatic monocyclic, bicyclic or bridged carbocyclic ring or ring system containing at least one double bond and containing at least one heteroatom selected from N, NH, S (including SO and SO₂) and O.

“Aryl” means a monocyclic, bicyclic or tricyclic carbocyclic aromatic ring or ring system containing 5-14 carbon atoms, wherein at least one of the rings is aromatic. Examples of aryl include phenyl and naphthyl. In one embodiment of the present invention, aryl is phenyl.

“Heteroaryl” means monocyclic, bicyclic or tricyclic ring or ring system containing 5-14 carbon atoms and containing at least one ring heteroatom selected from N, NH, S (including SO and SO₂) and O, wherein at least one of the heteroatom containing rings is aromatic. Examples of heteroaryl include pyrrolyl, isoxazolyl, isothiazolyl, pyrazolyl, pyridyl, oxazolyl, oxadiazolyl, thiadiazolyl, thiazolyl, imidazolyl, triazolyl, tetrazolyl, furanyl, triazinyl, thienyl, pyrimidyl, pyridazinyl, pyrazinyl, benzisoxazolyl, benzoxazolyl, benzothiazolyl, benzimidazolyl, benzofuranyl, benzpyrazole (or indazole), benzothiophenyl (including S-oxide and dioxide), furo(2,3-b)pyridyl, quinolyl, indolyl, isoquinolyl, quinazolinyl, dibenzofuranyl, and the like. In one embodiment of the present invention, heteroaryl is pyridine.

“Halogen” includes fluorine, chlorine, bromine and iodine. In one embodiment of the present invention, halogen is bromine, chlorine or fluorine. In another embodiment of the present invention, halogen is chlorine or fluorine. In another embodiment of the present invention, halogen is bromine. In another embodiment of the present invention, halogen is chlorine. In another embodiment of the present invention, halogen is fluorine.

“Me” represents methyl.

“Oxo” is ═O.

When any variable (e.g., R¹, R^(a), etc.) occurs more than one time in any constituent or in formula I, its definition on each occurrence is independent of its definition at every other occurrence. Also, combinations of substituents and/or variables are permissible only if such combinations result in stable compounds. A squiggly line across a bond in a substituent variable represents the point of attachment.

Under standard nomenclature used throughout this disclosure, the terminal portion of the designated side chain is described first, followed by the adjacent functionality toward the point of attachment. For example, a C₁₋₅ alkylcarbonylamino C₁₋₆ alkyl substituent is equivalent to:

For example, —NR^(c)C(O)R^(e) is equivalent to —N(R^(c))C(O)R^(e).

Unless expressly depicted or described otherwise, substituents depicted in a structural formula with a “floating” bond, such as but not limited to R³, is permitted on any available carbon atom in the ring to which the substituent is attached. In one embodiment of the present invention, R³ may be substituted on any CH in the ring to which R³ is attached.

In choosing compounds of the present invention, one of ordinary skill in the art will recognize that the various substituents, i.e. R¹, R², etc., are to be chosen in conformity with well-known principles of chemical structure connectivity and stability.

The term “substituted” shall be deemed to include multiple degrees of substitution by a named substitutent. Where multiple substituent moieties are disclosed or claimed, the substituted compound can be independently substituted by one or more of the disclosed or claimed substituent moieties, singly or plurally. By independently substituted, it is meant that the (two or more) substituents can be the same or different.

The phrase “pharmaceutically acceptable” is employed herein to refer to those compounds, materials, compositions, salts and/or dosage forms which are, using sound medical judgment, and following all applicable government regulations, safe and suitable for administration to a human being or an animal.

The term “% enantiomeric excess” (abbreviated “ee”) shall mean the % major enantiomer less the % minor enantiomer. Thus, a 70% enantiomeric excess corresponds to formation of 85% of one enantiomer and 15% of the other. The term “enantiomeric excess” is synonymous with the term “optical purity.”

Compounds of Formula I may contain one or more asymmetric centers and can thus occur as racemates and racemic mixtures, single enantiomers, diastereomeric mixtures and individual diastereomers. The present invention is meant to comprehend all such isomeric forms of the compounds of Formula I.

Some of the compounds described herein contain olefinic double bonds, and unless specified otherwise, are meant to include both E and Z geometric isomers.

Tautomers are defined as compounds that undergo rapid proton shifts from one atom of the compound to another atom of the compound. Some of the compounds described herein may exist as tautomers with different points of attachment of hydrogen. Such an example may be a ketone and its enol form known as keto-enol tautomers. The individual tautomers as well as mixture thereof are encompassed with compounds of Formula I.

In the compounds of general formula I, the atoms may exhibit their natural isotopic abundances, or one or more of the atoms may be artificially enriched in a particular isotope having the same atomic number, but an atomic mass or mass number different from the atomic mass or mass number predominately found in nature. The present invention is meant to include all suitable isotopic variations of the compounds of structural formula I. For example, different isotopic forms of hydrogen (H) include protium (¹H), deuterium (²H), and tritium (³H). Protium is the predominant hydrogen isotope found in nature. Enriching for deuterium may afford certain therapeutic advantages, such as increasing in vivo half-life or reducing dosage requirements, or may provide a compound useful as a standard for characterization of biological samples. Tritium is radioactive and may therefore provide for a radiolabeled compound, useful as a tracer in metabolic or kinetic studies. Isotopically-enriched compounds within structural formula I, can be prepared without undue experimentation by conventional techniques well known to those skilled in the art or by processes analogous to those described in the Schemes and Examples herein using appropriate isotopically-enriched reagents and/or intermediates.

The independent syntheses of optical isomers and diastereoisomers or their chromatographic separations may be achieved as known in the art by appropriate modification of the methodology disclosed herein. Their absolute stereochemistry may be determined by the X-ray crystallography of crystalline products or crystalline intermediates which are derivatized, if necessary, with a reagent containing an asymmetric center of known absolute configuration.

If desired, racemic mixtures of the compounds may be separated so that the individual enantiomers are isolated. The separation can be carried out by methods well-known in the art, such as the coupling of a racemic mixture of compounds to an enantiomerically pure compound to form a diastereoisomeric mixture, followed by separation of the individual diastereoisomers by standard methods, such as fractional crystallization or chromatography. The coupling reaction is often the formation of salts using an enantiomerically pure acid or base. The diasteromeric derivatives may then be converted to the pure enantiomers by cleavage of the added chiral residue. The racemic mixture of the compounds can also be separated directly by chromatographic methods utilizing chiral stationary phases, which methods are well known in the art.

Alternatively, any enantiomer of a compound may be obtained by stereoselective synthesis using optically pure starting materials or reagents of known configuration by methods well known in the art.

Furthermore, some of the crystalline forms for compounds of the present invention may exist as polymorphs and as such are intended to be included in the present invention. In addition, some of the compounds of the instant invention may form solvates with water or common organic solvents. Such solvates are encompassed within the scope of this invention.

It is generally preferable to administer compounds of the present invention as enantiomerically pure formulations. Racemic mixtures can be separated into their individual enantiomers by any of a number of conventional methods. These include chiral chromatography, derivatization with a chiral auxiliary followed by separation by chromatography or crystallization, and fractional crystallization of diastereomeric salts.

Salts:

It will be understood that, as used herein, references to the compounds of the present invention are meant to also include the pharmaceutically acceptable salts, and also salts that are not pharmaceutically acceptable when they are used as precursors to the free compounds or their pharmaceutically acceptable salts or in other synthetic manipulations.

The compounds of the present invention may be administered in the form of a pharmaceutically acceptable salt. The term “pharmaceutically acceptable salt” refers to salts prepared from pharmaceutically acceptable non-toxic bases or acids including inorganic or organic bases and inorganic or organic acids. Salts of basic compounds encompassed within the term “pharmaceutically acceptable salt” refer to non-toxic salts of the compounds of this invention which are generally prepared by reacting the free base with a suitable organic or inorganic acid. Representative salts of basic compounds of the present invention include, but are not limited to, the following: acetate, benzenesulfonate, benzoate, bicarbonate, bisulfate, bitartrate, borate, bromide, camsylate, carbonate, chloride, clavulanate, citrate, dihydrochloride, edetate, edisylate, estolate, esylate, fumarate, gluceptate, gluconate, glutamate, glycollylarsanilate, hexylresorcinate, hydrabamine, hydrobromide, hydrochloride, hydroxynaphthoate, iodide, isothionate, lactate, lactobionate, laurate, malate, maleate, mandelate, mesylate, methylbromide, methylnitrate, methylsulfate, mucate, napsylate, nitrate, N-methylglucamine ammonium salt, oleate, oxalate, pamoate (embonate), palmitate, pantothenate, phosphate/diphosphate, polygalacturonate, salicylate, stearate, sulfate, subacetate, succinate, tannate, tartrate, teoclate, tosylate, triethiodide and valerate. Furthermore, where the compounds of the invention carry an acidic moiety, suitable pharmaceutically acceptable salts thereof include, but are not limited to, salts derived from inorganic bases including aluminum, ammonium, calcium, copper, ferric, ferrous, lithium, magnesium, manganic, mangamous, potassium, sodium, zinc, and the like. Particularly preferred are the ammonium, calcium, magnesium, potassium, and sodium salts. Salts derived from pharmaceutically acceptable organic non-toxic bases include salts of primary, secondary, and tertiary amines, cyclic amines, and basic ion-exchange resins, such as arginine, betaine, caffeine, choline, N,N-dibenzylethylenediamine, diethylamine, 2-diethylaminoethanol, 2-dimethylaminoethanol, ethanolamine, ethylenediamine, N-ethylmorpholine, N-ethylpiperidine, glucamine, glucosamine, histidine, hydrabamine, isopropylamine, lysine, methylglucamine, morpholine, piperazine, piperidine, polyamine resins, procaine, purines, theobromine, triethylamine, trimethylamine, tripropylamine, tromethamine, and the like.

Also, in the case of a carboxylic acid (—COOH) or alcohol group being present in the compounds of the present invention, pharmaceutically acceptable esters of carboxylic acid derivatives, such as methyl, ethyl, or pivaloyloxymethyl, or acyl derivatives of alcohols, such as O-acetyl, O-pivaloyl, O-benzoyl, and O-aminoacyl, can be employed. Included are those esters and acyl groups known in the art for modifying the solubility or hydrolysis characteristics for use as sustained-release or prodrug formulations.

Solvates, and in particular, the hydrates of the compounds of the present invention are included in the present invention as well.

Utilities

The compounds of the present invention are potent agonists of the GPR40 receptor. The compounds, and pharmaceutically acceptable salts thereof, may be efficacious in the treatment of diseases that are modulated by GPR40 ligands, which are generally agonists. Many of these diseases are summarized below.

One or more of these diseases may be treated by the administration of a therapeutically effective amount of a compound of the present invention, or a pharmaceutically acceptable salt thereof, to a patient in need of treatment. Also, the compounds of the present invention may be used for the manufacture of a medicament which may be useful for treating one or more of these diseases: (1) non-insulin dependent diabetes mellitus (Type 2 diabetes); (2) hyperglycemia; (3) insulin resistance; (4) Metabolic Syndrome; (5) obesity; (6) hypercholesterolemia; (7) hypertriglyceridemia (elevated levels of triglyceride-rich-lipoproteins); (8) mixed or diabetic dyslipidemia; (9) low HDL cholesterol; (10) high LDL cholesterol; (11) hyperapo-B liproteinemia; and (12) atherosclerosis.

Preferred uses of the compounds may be for the treatment of one or more of the following diseases by administering a therapeutically effective amount to a patient in need of treatment. The compounds may be used for manufacturing a medicament for the treatment of one or more of these diseases: (1) Type 2 diabetes, and specifically hyperglycemia associated with Type 2 diabetes; (2) Metabolic Syndrome; (3) obesity; and (4) hypercholesterolemia.

The compounds may be effective in lowering glucose and lipids in diabetic patients and in non-diabetic patients who have impaired glucose tolerance and/or are in a pre-diabetic condition. The compounds may ameliorate hyperinsulinemia, which often occurs in diabetic or pre-diabetic patients, by modulating the swings in the level of serum glucose that often occurs in these patients. The compounds may also be effective in treating or reducing insulin resistance. The compounds may be effective in treating or preventing gestational diabetes.

The compounds may also be effective in treating or preventing lipid disorders. The compounds may be effective in treating or preventing diabetes related disorders. The compounds may also be effective in treating or preventing obesity related disorders.

The compounds of this invention may also have utility in improving or restoring 3-cell function, so that they may be useful in treating Type 1 diabetes or in delaying or preventing a patient with Type 2 diabetes from needing insulin therapy.

The invention also includes pharmaceutically acceptable salts of the compounds, and pharmaceutical compositions comprising the compounds and a pharmaceutically acceptable carrier. The compounds may be useful in treating insulin resistance, Type 2 diabetes, hypperglycemia, and dyslipidemia that is associated with Type 2 diabetes and insulin resistance. The compounds may also be useful for the treatment of obesity.

A compound of the present invention, or a pharmaceutically acceptable salt thereof, may be used in the manufacture of a medicament for the treatment of Type 2 diabetes in a human or other mammalian patient.

A method of treating Type 2 diabetes comprises the administration of a therapeutically effective amount of a compound of the present invention, or a pharmaceutically acceptable salt thereof, or a pharmaceutical composition comprising the compound, to a human or other mammalian subject or patient in need of treatment. Other medical uses of the compounds of the present invention are described herein.

The term “diabetes,” as used herein, includes both insulin-dependent diabetes mellitus (i.e., IDDM, also known as type 1 diabetes) and non-insulin-dependent diabetes mellitus (i.e., NIDDM, also known as Type 2 diabetes). Type 1 diabetes, or insulin-dependent diabetes, is the result of an absolute deficiency of insulin, the hormone which regulates glucose utilization. Type 2 diabetes, or insulin-independent diabetes (i.e., non-insulin-dependent diabetes mellitus), often occurs in the face of normal, or even elevated levels of insulin and appears to be the result of the inability of tissues to respond appropriately to insulin. Most of the Type 2 diabetics are also obese. The compositions of the present invention may be useful for treating both Type 1 and Type 2 diabetes. The term “diabetes associated with obesity” refers to diabetes caused by obesity or resulting from obesity.

Diabetes is characterized by a fasting plasma glucose level of greater than or equal to 126 mg/dl. A diabetic subject has a fasting plasma glucose level of greater than or equal to 126 mg/dl. A pre diabetic subject is someone suffering from prediabetes. Prediabetes is characterized by an impaired fasting plasma glucose (FPG) level of greater than or equal to 110 mg/dl and less than 126 mg/dl; or impaired glucose tolerance; or insulin resistance. A prediabetic subject is a subject with impaired fasting glucose (a fasting plasma glucose (FPG) level of greater than or equal to 110 mg/dl and less than 126 mg/dl); or impaired glucose tolerance (a 2 hour plasma glucose level of ≧140 mg/dl and <200 mg/dl); or insulin resistance, resulting in an increased risk of developing diabetes.

Treatment of diabetes mellitus refers to the administration of a compound or combination of the present invention to treat a diabetic subject. One outcome of treatment may be decreasing the glucose level in a subject with elevated glucose levels. Another outcome of treatment may be decreasing insulin levels in a subject with elevated insulin levels. Another outcome of treatment may be decreasing plasma triglycerides in a subject with elevated plasma triglycerides. Another outcome of treatment is decreasing LDL cholesterol in a subject with high LDL cholesterol levels. Another outcome of treatment may be increasing HDL cholesterol in a subject with low HDL cholesterol levels. Another outcome of treatment is increasing insulin sensivity. Another outcome of treatment may be enhancing glucose tolerance in a subject with glucose intolerance. Yet another outcome of treatment may be decreasing insulin resistance in a subject with increased insulin resistance or elevated levels of insulin. Prevention of diabetes mellitus, in particular diabetes associated with obesity, refers to the administration of a compound or combination of the present invention to prevent the onset of diabetes in a subject in need thereof. A subject in need of preventing diabetes is a prediabetic subject that is overweight or obese.

The term “diabetes related disorders” should be understood to mean disorders that are associated with, caused by, or result from diabetes. Examples of diabetes related disorders include retinal damage, kidney disease, and nerve damage.

The term “atherosclerosis” as used herein encompasses vascular diseases and conditions that are recognized and understood by physicians practicing in the relevant fields of medicine. Atherosclerotic cardiovascular disease, coronary heart disease (also known as coronary artery disease or ischemic heart disease), cerebrovascular disease and peripheral vessel disease are all clinical manifestations of atherosclerosis and are therefore encompassed by the terms “atherosclerosis” and “atherosclerotic disease.” The combination comprised of a therapeutically effective amount of a GPR40 agonist in combination with a therapeutically effective amount of an anti-hypertensive agent may be administered to prevent or reduce the risk of occurrence, or recurrence where the potential exists, of a coronary heart disease event, a cerebrovascular event, or intermittent claudication. Coronary heart disease events are intended to include CHD death, myocardial infarction (i.e., a heart attack), and coronary revascularization procedures. Cerebrovascular events are intended to include ischemic or hemorrhagic stroke (also known as cerebrovascular accidents) and transient ischemic attacks. Intermittent claudication is a clinical manifestation of peripheral vessel disease. The term “atherosclerotic disease event” as used herein is intended to encompass coronary heart disease events, cerebrovascular events, and intermittent claudication. It is intended that persons who have previously experienced one or more non-fatal atherosclerotic disease events are those for whom the potential for recurrence of such an event exists. The term “atherosclerosis related disorders” should be understood to mean disorders associated with, caused by, or resulting from atherosclerosis.

The term “hypertension” as used herein includes essential, or primary, hypertension wherein the cause is not known or where hypertension is due to greater than one cause, such as changes in both the heart and blood vessels; and secondary hypertension wherein the cause is known. Causes of secondary hypertension include, but are not limited to obesity; kidney disease; hormonal disorders; use of certain drugs, such as oral contraceptives, corticosteroids, cyclosporin, and the like. The term “hypertension” encompasses high blood pressure, in which both the systolic and diastolic pressure levels are elevated (≧140 mmHg/≧90 mmHg), and isolated systolic hypertension, in which only the systolic pressure is elevated to greater than or equal to 140 mm Hg, while the diastolic pressure is less than 90 mm Hg. Normal blood pressure may be defined as less than 120 mmHg systolic and less than 80 mmHg diastolic. A hypertensive subject is a subject with hypertension. A pre-hypertensive subject is a subject with a blood pressure that is between 120 mmHg over 80 mmHg and 139 mmHg over 89 mmHg. One outcome of treatment is decreasing blood pressure in a subject with high blood pressure. Treatment of hypertension refers to the administration of the compounds and combinations of the present invention to treat hypertension in a hypertensive subject. Treatment of hypertension-related disorder refers to the administration of a compound or combination of the present invention to treat the hypertension-related disorder. Prevention of hypertension, or a hypertension related disorder, refers to the administration of the combinations of the present invention to a pre-hypertensive subject to prevent the onset of hypertension or a hypertension related disorder. The hypertension-related disorders herein are associated with, caused by, or result from hypertension. Examples of hypertension-related disorders include, but are not limited to: heart disease, heart failure, heart attack, kidney failure, and stroke.

Dyslipidemias and lipid disorders are disorders of lipid metabolism including various conditions characterized by abnormal concentrations of one or more lipids (i.e. cholesterol and triglycerides), and/or apolipoproteins (i.e., apolipoproteins A, B, C and E), and/or lipoproteins (i.e., the macromolecular complexes formed by the lipid and the apolipoprotein that allow lipids to circulate in blood, such as LDL, VLDL and IDL). Hyperlipidemia is associated with abnormally high levels of lipids, LDL and VLDL cholesterol, and/or triglycerides. Treatment of dyslipidemia refers to the administration of the combinations of the present invention to a dyslipidemic subject. Prevention of dyslipidemia refers to the administration of the combinations of the present invention to a pre-dyslipidemic subject. A pre-dyslipidemic subject is a subject with higher than normal lipid levels, that is not yet dyslipidemic.

The terms “dyslipidemia related disorders” and “lipid disorder related disorders” should be understood to mean disorders associated with, caused by, or resulting from dyslipidemia or lipid disorders. Examples of dylipidemia related disorder and lipid disorder related disorders include, but are not limited to: hyperlipidemia, hypertriglyceridemia, hypercholesterolemia, low high density lipoprotein (HDL) levels, high plasma low density lipoprotein (LDL) levels, atherosclerosis and its sequelae, coronary artery or carotid artery disease, heart attack, and stroke.

The term “obesity” as used herein is a condition in which there is an excess of body fat. The operational definition of obesity is based on the Body Mass Index (BMI), which is calculated as body weight per height in meters squared (kg/m²). “Obesity” refers to a condition whereby an otherwise healthy subject has a Body Mass Index (BMI) greater than or equal to 30 kg/m², or a condition whereby a subject with at least one co-morbidity has a BMI greater than or equal to 27 kg/m². An “obese subject” is an otherwise healthy subject with a Body Mass Index (BMI) greater than or equal to 30 kg/m² or a subject with at least one co-morbidity with a BMI greater than or equal to 27 kg/m². An overweight subject is a subject at risk of obesity. A “subject at risk of obesity” is an otherwise healthy subject with a BMI of 25 kg/m² to less than 30 kg/m² or a subject with at least one co-morbidity with a BMI of 25 kg/m² to less than 27 kg/m².

The increased risks associated with obesity occur at a lower Body Mass Index (BMI) in Asians. In Asian countries, including Japan, “obesity” refers to a condition whereby a subject with at least one obesity-induced or obesity-related co-morbidity, that requires weight reduction or that would be improved by weight reduction, has a BMI greater than or equal to 25 kg/m². In Asian countries, including Japan, an “obese subject” refers to a subject with at least one obesity-induced or obesity-related co-morbidity that requires weight reduction or that would be improved by weight reduction, with a BMI greater than or equal to 25 kg/m². In Asia-Pacific, a “subject at risk of obesity” is a subject with a BMI of greater than 23 kg/m² to less than 25 kg/m².

As used herein, the term “obesity” is meant to encompass all of the above definitions of obesity.

Obesity-induced or obesity-related co-morbidities include, but are not limited to, diabetes mellitus, non-insulin dependent diabetes mellitus—type 2, diabetes associated with obesity, impaired glucose tolerance, impaired fasting glucose, insulin resistance syndrome, dyslipidemia, hypertension, hypertension associated with obesity, hyperuricacidemia, gout, coronary artery disease, myocardial infarction, angina pectoris, sleep apnea syndrome, Pickwickian syndrome, fatty liver; cerebral infarction, cerebral thrombosis, transient ischemic attack, orthopedic disorders, arthritis deformans, lumbodynia, emmeniopathy, and infertility. In particular, co-morbidities include: hypertension, hyperlipidemia, dyslipidemia, glucose intolerance, cardiovascular disease, sleep apnea, and other obesity-related conditions.

Treatment of obesity and obesity-related disorders refers to the administration of the compounds of the present invention to reduce or maintain the body weight of an obese subject. One outcome of treatment may be reducing the body weight of an obese subject relative to that subject's body weight immediately before the administration of the compounds of the present invention. Another outcome of treatment may be preventing body weight regain of body weight previously lost as a result of diet, exercise, or pharmacotherapy. Another outcome of treatment may be decreasing the occurrence of and/or the severity of obesity-related diseases. The treatment may suitably result in a reduction in food or calorie intake by the subject, including a reduction in total food intake, or a reduction of intake of specific components of the diet such as carbohydrates or fats; and/or the inhibition of nutrient absorption; and/or the inhibition of the reduction of metabolic rate; and in weight reduction in patients in need thereof. The treatment may also result in an alteration of metabolic rate, such as an increase in metabolic rate, rather than or in addition to an inhibition of the reduction of metabolic rate; and/or in minimization of the metabolic resistance that normally results from weight loss.

Prevention of obesity and obesity-related disorders refers to the administration of the compounds of the present invention to reduce or maintain the body weight of a subject at risk of obesity. One outcome of prevention may be reducing the body weight of a subject at risk of obesity relative to that subject's body weight immediately before the administration of the compounds of the present invention. Another outcome of prevention may be preventing body weight regain of body weight previously lost as a result of diet, exercise, or pharmacotherapy. Another outcome of prevention may be preventing obesity from occurring if the treatment is administered prior to the onset of obesity in a subject at risk of obesity. Another outcome of prevention may be decreasing the occurrence and/or severity of obesity-related disorders if the treatment is administered prior to the onset of obesity in a subject at risk of obesity. Moreover, if treatment is commenced in already obese subjects, such treatment may prevent the occurrence, progression or severity of obesity-related disorders, such as, but not limited to, arteriosclerosis, Type II diabetes, polycystic ovarian disease, cardiovascular diseases, osteoarthritis, dermatological disorders, hypertension, insulin resistance, hypercholesterolemia, hypertriglyceridemia, and cholelithiasis.

The obesity-related disorders herein are associated with, caused by, or result from obesity. Examples of obesity-related disorders include overeating and bulimia, hypertension, diabetes, elevated plasma insulin concentrations and insulin resistance, dyslipidemias, hyperlipidemia, endometrial, breast, prostate and colon cancer, osteoarthritis, obstructive sleep apnea, cholelithiasis, gallstones, heart disease, abnormal heart rhythms and arrythmias, myocardial infarction, congestive heart failure, coronary heart disease, sudden death, stroke, polycystic ovarian disease, craniopharyngioma, the Prader-Willi Syndrome, Frohlich's syndrome, GH-deficient subjects, normal variant short stature, Turner's syndrome, and other pathological conditions showing reduced metabolic activity or a decrease in resting energy expenditure as a percentage of total fat-free mass, e.g, children with acute lymphoblastic leukemia. Further examples of obesity-related disorders are metabolic syndrome, also known as syndrome X, insulin resistance syndrome, sexual and reproductive dysfunction, such as infertility, hypogonadism in males and hirsutism in females, gastrointestinal motility disorders, such as obesity-related gastro-esophageal reflux, respiratory disorders, such as obesity-hypoventilation syndrome (Pickwickian syndrome), cardiovascular disorders, inflammation, such as systemic inflammation of the vasculature, arteriosclerosis, hypercholesterolemia, hyperuricaemia, lower back pain, gallbladder disease, gout, and kidney cancer. The compounds of the present invention are also useful for reducing the risk of secondary outcomes of obesity, such as reducing the risk of left ventricular hypertrophy.

The term “metabolic syndrome”, also known as syndrome X, is defined in the Third Report of the National Cholesterol Education Program Expert Panel on Detection, Evaluation and Treatment of High Blood Cholesterol in Adults (Adult Treatment Panel III, or ATP III), National Institutes of Health, 2001, NIH Publication No. 01-3670. E. S. Ford et al., JAMA, vol. 287 (3), Jan. 16, 2002, pp 356-359. Briefly, a person is defined as having metabolic syndrome if the person has three or more of the following disorders: abdominal obesity, hypertriglyceridemia, low HDL cholesterol, high blood pressure, and high fasting plasma glucose. The criteria for these are defined in ATP-III. Treatment of metabolic syndrome refers to the administration of the combinations of the present invention to a subject with metabolic syndrome. Prevention of metabolic syndrome refers to the administration of the combinations of the present invention to a subject with two of the disorders that define metabolic syndrome. A subject with two of the disorders that define metabolic syndrome is a subject that has developed two of the disorders that define metabolic syndrome, but has not yet developed three or more of the disorders that define metabolic syndrome.

The terms “administration of” and or “administering a” compound should be understood to mean providing a compound of the invention or a prodrug of a compound of the invention to a human or other mammal in need of treatment.

The term “patient” should be understood to mean a human or other mammal in need of treatment.

The administration of the compound of structural formula I in order to practice the present methods of therapy is carried out by administering a therapeutically effective amount of the compound of structural formula I to the mammal (human or other mammal) in need of such treatment or prophylaxis. The need for a prophylactic administration according to the methods of the present invention is determined via the use of well known risk factors. The therapeutically effective amount of an individual compound is determined, in the final analysis, by the physician or veterinarian in charge of the case, but depends on factors such as the exact disease to be treated, the severity of the disease and other diseases or conditions from which the patient suffers, the chosen route of administration other drugs and treatments which the patient may concomitantly require, and other factors in the physician's judgment.

The usefulness of the present compounds in these diseases or disorders may be demonstrated in animal disease models that have been reported in the literature.

Administration and Dose Ranges

Any suitable route of administration may be employed for providing a mammal, especially a human, with a therapeutically effective dose of a compound of the present invention. For example, oral, rectal, topical, parenteral, ocular, pulmonary, nasal, and the like may be employed. Dosage forms include tablets, troches, dispersions, suspensions, solutions, capsules, creams, ointments, aerosols, and the like. Preferably compounds of the present invention are administered orally.

In the treatment or prevention of conditions which require agonism of GPR40 receptor activity, an appropriate dosage level will generally be about 0.01 to 500 mg per kg patient body weight per day which may be administered in single or multiple doses. Preferably, the dosage level will be about 0.1 to about 250 mg/kg per day; more preferably about 0.5 to about 100 mg/kg per day. A suitable dosage level may be about 0.01 to 250 mg/kg per day, about 0.05 to 100 mg/kg per day, or about 0.1 to 50 mg/kg per day. Within this range the dosage may be 0.05 to 0.5, 0.5 to 5 or 5 to 50 mg/kg per day. For oral administration, the compositions may preferably be provided in the form of tablets containing 1.0 to 1000 mg of the active ingredient, particularly 1.0, 5.0, 10.0, 15.0. 20.0, 25.0, 50.0, 75.0, 100.0, 150.0, 200.0, 250.0, 300.0, 400.0, 500.0, 600.0, 750.0, 800.0, 900.0, and 1000.0 mg of the active ingredient for the symptomatic adjustment of the dosage to the patient to be treated. The compounds may be administered on a regimen of 1 to 4 times per day, preferably once or twice per day.

When treating or preventing diabetes mellitus and/or hyperglycemia or hypertriglyceridemia or other diseases for which compounds of the present invention may be indicated, generally satisfactory results could be obtained when the compounds of the present invention are administered at a daily dosage of from about 0.1 mg to about 100 mg per kilogram of animal body weight, preferably given as a single daily dose or in divided doses two to six times a day, or in sustained release form. For most large mammals, the total daily dosage is from about 1.0 mg to about 1000 mg, preferably from about 1 mg to about 50 mg. In the case of a 70 kg adult human, the total daily dose will generally be from about 7 mg to about 350 mg. This dosage regimen may be adjusted to provide the optimal therapeutic response.

It will be understood, however, that the specific dose level and frequency of dosage for any particular patient may be varied and will depend upon a variety of factors including the activity of the specific compound employed, the metabolic stability and length of action of that compound, the age, body weight, general health, sex, diet, mode and time of administration, rate of excretion, drug combination, the severity of the particular condition, and the patient undergoing therapy.

The compounds of this invention may be used in pharmaceutical compositions comprising (a) the compound(s) or a pharmaceutically acceptable salt thereof, and (b) a pharmaceutically acceptable carrier. The compounds of this invention may be used in pharmaceutical compositions that include one or more other active pharmaceutical ingredients. The compounds of this invention may also be used in pharmaceutical compositions in which the compound of the present invention or a pharmaceutically acceptable salt thereof is the only active ingredient.

The term “composition,” as in pharmaceutical composition, is intended to encompass a product comprising the active ingredient(s), and the inert ingredient(s) that make up the carrier, as well as any product which results, directly or indirectly, from combination, complexation or aggregation of any two or more of the ingredients, or from dissociation of one or more of the ingredients, or from other types of reactions or interactions of one or more of the ingredients. Accordingly, the pharmaceutical compositions of the present invention encompass any composition made by admixing a compound of the present invention and a pharmaceutically acceptable carrier.

Combination Therapy

The compounds of the present invention may be useful in methods for the prevention or treatment of the aforementioned diseases, disorders and conditions in combination with other therapeutic agents.

The compounds of the present invention may be useful in combination with one or more other drugs in the treatment, prevention, suppression or amelioration of diseases or conditions for which compounds of formula I or the other drugs may have utility, where the combination of the drugs together are safer, more effective or more therapeutically effective than either drug alone. Such other drug(s) may be administered, by a route and in an amount commonly used therefore, contemporaneously or sequentially with a compound of formula I. When a compound of formula I is used contemporaneously with one or more other drugs, a pharmaceutical composition in unit dosage form containing such other drugs and the compound of formula I is preferred. However, the combination therapy may also include therapies in which the compound of formula I and one or more other drugs are administered on different overlapping schedules. It is also contemplated that when used in combination with one or more other active ingredients, the compounds of the present invention and the other active ingredients may be used in lower doses than when each is used singly. Accordingly, the pharmaceutical compositions of the present invention include those that contain one or more other active ingredients, in addition to a compound of formula I.

Examples of other active ingredients that may be administered separately or in the same pharmaceutical composition in combination with a compound of the formulas described herein include, but are not limited to: (1) dipeptidyl peptidase-IV (DPP-4) inhibitors (e.g., sitagliptin, omarigliptin, trelagliptin, teneligliptin, bisegliptin, anagliptin, vildagliptin, saxagliptin, alogliptin, melogliptin, linagliptin, gosogliptin, evogliptin, and gemigliptin), (2) insulin sensitizers, including (i) PPARγ agonists, such as the glitazones (e.g. pioglitazone, AMG 131, MBX2044, mitoglitazone, lobeglitazone, IDR-105, rosiglitazone, and balaglitazone), and other PPAR ligands, including (1) PPARα/γ dual agonists (e.g., ZYH₂, ZYH₁, GFT505, chiglitazar, muraglitazar, aleglitazar, sodelglitazar, and naveglitazar); (2) PPARα agonists such as fenofibric acid derivatives (e.g., gemfibrozil, clofibrate, ciprofibrate, fenofibrate, bezafibrate), (3) selective PPARγ modulators (SPPARγM's), (e.g., such as those disclosed in WO 02/060388, WO 02/08188, WO 2004/019869, WO 2004/020409, WO 2004/020408, and WO 2004/066963); and (4) PPARγ partial agonists; (ii) biguanides, such as metformin and its pharmaceutically acceptable salts, in particular, metformin hydrochloride, and extended-release formulations thereof, such as Glumetza™, Fortamet™, and GlucophageXR™; and (iii) protein tyrosine phosphatase-1B (PTP-1B) inhibitors (e.g., ISIS-113715 and TTP814); (3) insulin or insulin analogs (e.g., insulin detemir, insulin glulisine, insulin degludec, insulin glargine, insulin lispro and inhalable formulations of each); (4) leptin and leptin derivatives and agonists; (5) amylin and amylin analogs (e.g., pramlintide); (6) sulfonylurea and non-sulfonylurea insulin secretagogues (e.g., tolbutamide, glyburide, glipizide, glimepiride, mitiglinide, meglitinides, nateglinide and repaglinide); (7) α-glucosidase inhibitors (e.g., acarbose, voglibose and miglitol); (8) glucagon receptor antagonists (e.g., MK-3577, MK-0893, LY-2409021 and KT6-971); (9) incretin mimetics, such as GLP-1, GLP-1 analogs, derivatives, and mimetics; and GLP-1 receptor agonists (e.g., dulaglutide, semaglutide, albiglutide, exenatide, liraglutide, lixisenatide, taspoglutide, CJC-1131, and BIM-51077, including intranasal, transdermal, and once-weekly formulations thereof); (10) LDL cholesterol lowering agents such as (i) HMG-CoA reductase inhibitors (e.g., simvastatin, lovastatin, pravastatin, crivastatin, fluvastatin, atorvastatin, pitavastatin and rosuvastatin), (ii) bile acid sequestering agents (e.g., colestilan, colestimide, colesevalam hydrochloride, colestipol, cholestyramine, and dialkylaminoalkyl derivatives of a cross-linked dextran), (iii) inhibitors of cholesterol absorption, (e.g., ezetimibe), and (iv) acyl CoA:cholesterol acyltransferase inhibitors, (e.g., avasimibe); (11) HDL-raising drugs, (e.g., niacin and nicotinic acid receptor agonists, and extended-release versions thereof; (12) antiobesity compounds; (13) agents intended for use in inflammatory conditions, such as aspirin, non-steroidal anti-inflammatory drugs or NSAIDs, glucocorticoids, and selective cyclooxygenase-2 or COX-2 inhibitors; (14) antihypertensive agents, such as ACE inhibitors (e.g., lisinopril, enalapril, ramipril, captopril, quinapril, and tandolapril), A-II receptor blockers (e.g., losartan, candesartan, irbesartan, olmesartan, medoxomil, valsartan, telmisartan, and eprosartan), renin inhibitors (e.g., aliskiren), beta blockers, and calcium channel blockers; (15) glucokinase activators (GKAs) (e.g., AZD6370); (16) inhibitors of 11β-hydroxysteroid dehydrogenase type 1, (e.g., such as those disclosed in U.S. Pat. No. 6,730,690, and LY-2523199); (17) CETP inhibitors (e.g., anacetrapib, evacetrapib, torcetrapib, and AT-03); (18) inhibitors of fructose 1,6-bisphosphatase, (e.g., MB-07803, and such as those disclosed in U.S. Pat. Nos. 6,054,587; 6,110,903; 6,284,748; 6,399,782; and 6,489,476); (19) inhibitors of acetyl CoA carboxylase-1 or 2 (ACC₁ or ACC₂); (20) AMP-activated Protein Kinase (AMPK) activators (e.g., MB-11055); (21) other agonists of the G-protein-coupled receptors: (i) GPR-109, (ii) GPR-119 (e.g., MBX2982 and PSN821), (iii) GPR-40 (e.g., fasiglifam, JTT-851, TAK-875, and P-11187, and (iv) GPR-120 (e.g., KDT-501); (22) SSTR3 antagonists (e.g., pasireotide, and such as those disclosed in WO 2009/011836); (23) neuromedin U receptor agonists (e.g., such as those disclosed in WO 2009/042053, including, but not limited to, neuromedin S (NMS)); (24) SCD inhibitors; (25) GPR-105 antagonists (e.g., such as those disclosed in WO 2009/000087); (26) SGLT inhibitors (e.g., LIK-066, ASP1941, SGLT-3, ertugliflozin, empagliflozin, dapagliflozin, canagliflozin, BI-10773, PF-04971729, remogloflozin, luseogliflozin, tofogliflozin, ipragliflozin, and LX-4211); (27) inhibitors of (i) acyl coenzyme A:diacylglycerol acyltransferase 1, DGAT-1 (e.g., pradigastat, and P-7435) and acyl coenzyme A:diacylglycerol acyltransferase 2, DGAT-2; (28) inhibitors of fatty acid synthase; (29) inhibitors of acyl coenzyme A:monoacylglycerol acyltransferase 1 and 2 (MGAT-1 and MGAT-2); (30) agonists of the TGR5 receptor (also known as GPBAR1, BG37, GPCR19, GPR131, and M-BAR) (eg., sodium taurocholate); (31) ileal bile acid transporter inhibitors (eg., elobixibat); (32) PACAP, PACAP mimetics, and PACAP receptor 3 agonists; (33) PPAR agonists; (34) protein tyrosine phosphatase-1B (PTP-1B) inhibitors; (35) IL-1b antibodies and inhibitors, (e.g., gevokizumab, canakinumab, danazol, AC-201, and BLX-1002); and (36) bromocriptine mesylate and rapid-release formulations thereof.

Of particular interest are dipeptidyl peptidase-IV (DPP-4) inhibitors that may be useful in combination with compounds of the present invention. Such inhibitors include, without limitation, sitagliptin (disclosed in U.S. Pat. No. 6,699,871), omarigliptin, trelagliptin, teneligliptin, bisegliptin, anagliptin, LC15-0444, vildagliptin, saxagliptin, alogliptin, melogliptin, linagliptin, gosogliptin, evogliptin, gemigliptin, and pharmaceutically acceptable salts thereof, and fixed-dose combinations of these compounds with metformin hydrochloride, pioglitazone, rosiglitazone, simvastatin, atorvastatin, or a sulfonylurea.

Other GPR-40 agonists that may be useful in combination with compounds of the formulas described herein include, but are not limited to: (1) 5-[4-[[(1R)-4-[6-(3-hydroxy-3-methylbutoxy)-2-methylpyridine-3-yl]-2,3-dihydro-1H-indene-1-yl]oxy]phenyl]isothiazole-3-ol 1-oxide; (2) 5-(4-((3-(2,6-dimethyl-4-(3-(methylsulfonyl)propoxy)phenyl)phenyl)-methoxy)-phenyl)isothiazole-3-ol 1-oxide; and (3) 5-(4-((3-(2-methyl-6-(3-hydroxypropoxy)-pyridine-3-yl)-2-methylphenyl)methoxy)-phenyl)isothiazole-3-ol 1-oxide; and (4) 5-[4-[[3-[4-(3-aminopropoxy)-2,6-dimethylphenyl]phenyl]-methoxy]phenyl]isothiazole-3-ol 1-oxide, and pharmaceutically acceptable salts thereof.

Antiobesity compounds that may be combined with compounds of formula I include topiramate; zonisamide; naltrexone; phentermine; bupropion; the combination of bupropion and naltrexone; the combination of bupropion and zonisamide; the combination of topiramate and phentermine; fenfluramine; dexfenfluramine; sibutramine; lipase inhibitors, such as orlistat and cetilistat; melanocortin receptor agonists, in particular, melanocortin-4 receptor agonists; CCK-1 agonists; melanin-concentrating hormone (MCH) receptor antagonists; neuropeptide Y₁ or Y₅ antagonists (such as MK-0557); 33 adrenergic receptor agonists; CB-1 receptor inverse agonists and antagonists; ghrelin antagonists; bombesin receptor agonists (such as bombesin receptor subtype-3 agonists); and 5-hydroxytryptamine-2c (5-HT2c) agonists, such as lorcaserin. For a review of anti-obesity compounds that may be useful in combination with a compound of the present invention, see S. Chaki et al., “Recent advances in feeding suppressing agents: potential therapeutic strategy for the treatment of obesity,” Expert Opin. Ther. Patents, 11: 1677-1692 (2001); D. Spanswick and K. Lee, “Emerging antiobesity drugs,” Expert Opin. Emerging Drugs, 8: 217-237 (2003); J. A. Fernandez-Lopez, et al., “Pharmacological Approaches for the Treatment of Obesity,” Drugs, 62: 915-944 (2002); and K. M. Gadde, et al., “Combination pharmaceutical therapies for obesity,” Exp. Opin. Pharmacother., 10: 921-925 (2009).

Glucagon receptor antagonists that may be useful in combination with the compounds of formula I include, but are not limited to: (1) N-[4-((1S)-1-{3-(3,5-dichlorophenyl)-5-[6-(trifluoromethoxy)-2-naphthyl]-1H-pyrazol-1-yl}ethyl)benzoyl]-β-alanine; (2) N-[4-((1R)-1-{3-(3,5-dichlorophenyl)-5-[6-(trifluoromethoxy)-2-naphthyl]-1H-pyrazol-1-yl}ethyl)benzoyl]-β-alanine; (3) N-(4-{1-[3-(2,5-dichlorophenyl)-5-(6-methoxy-2-naphthyl)-1H-pyrazol-1-yl]ethyl}benzoyl)-3-alanine; (4) N-(4-{(1S)-1-[3-(3,5-dichlorophenyl)-5-(6-methoxy-2-naphthyl)-1H-pyrazol-1-yl]ethyl}benzoyl)-β-alanine; (5) N-(4-{(1S)-1-[(R)-(4-chlorophenyl)(7-fluoro-5-methyl-1H-indol-3-yl)methyl]butyl}benzoyl)-β-alanine; and (6) N-(4-{(1S)-1-[(4-chlorophenyl)(6-chloro-8-methylquinolin-4-1)methyl]butyl}benzoyl)-3-alanine; and pharmaceutically acceptable salts thereof.

Another embodiment of the present invention relates to a pharmaceutical composition comprising one or more of the following agents: (a) a compound of structural formula I; (b) one or more compounds selected from the group consisting of: (1) dipeptidyl peptidase-IV (DPP-4) inhibitors (e.g., sitagliptin, omarigliptin, trelagliptin, teneligliptin, bisegliptin, anagliptin, vildagliptin, saxagliptin, alogliptin, melogliptin, linagliptin, gosogliptin, evogliptin, and gemigliptin); (2) insulin sensitizers, including (i) PPARγ agonists, such as the glitazones (e.g. AMG 131, MBX2044, mitoglitazone, lobeglitazone, IDR-105, pioglitazone, rosiglitazone, and balaglitazone) and other PPAR ligands, including (1) PPARα/γ dual agonists, such as ZYH₁, YYH₂, chiglitazar, GFT505, muraglitazar, aleglitazar, sodelglitazar, and naveglitazar, (2) PPARα agonists, such as fenofibric acid derivatives (e.g., gemfibrozil, clofibrate, ciprofibrate, fenofibrate and bezafibrate), (3) selective PPARγ modulators (SPPARγM's), (4) PPARγ partial agonists; (ii) biguanides, such as metformin and its pharmaceutically acceptable salts, in particular, metformin hydrochloride, and extended-release formulations thereof, such as Glumetza®, Fortamet®, and GlucophageXR®; (iii) protein tyrosine phosphatase-1B (PTP-1B) inhibitors, such as ISI-113715, and TTP814; (3) sulfonylurea and non-sulfonylurea insulin secretagogues, (e.g., tolbutamide, glyburide, glipizide, glimepiride, mitiglinide, and meglitinides, such as nateglinide and repaglinide); (4) a-glucosidase inhibitors (e.g., acarbose, voglibose and miglitol); (5) glucagon receptor antagonists; (6) LDL cholesterol lowering agents such as (i) HMG-CoA reductase inhibitors (e.g., lovastatin, simvastatin, pravastatin, cerivastatin, fluvastatin, atorvastatin, pitavastatin, and rosuvastatin), (ii) bile acid sequestering agents (e.g., colestilan, cholestyramine, colestimide, colesevelam hydrochloride, colestipol, and dialkylaminoalkyl derivatives of a cross-linked dextran), (iii) inhibitors of cholesterol absorption, (e.g., ezetimibe), and (iv) acyl CoA:cholesterol acyltransferase inhibitors (e.g., avasimibe); (7) HDL-raising drugs, such as niacin or a salt thereof and extended-release versions thereof; and nicotinic acid receptor agonists; (8) antiobesity compounds; (9) agents intended for use in inflammatory conditions, such as aspirin, non-steroidal anti-inflammatory drugs (NSAIDs), glucocorticoids, and selective cyclooxygenase-2 (COX-2) inhibitors; (10) antihypertensive agents, such as ACE inhibitors (e.g., enalapril, lisinopril, ramipril, captopril, quinapril, and tandolapril), A-II receptor blockers (e.g., losartan, candesartan, irbesartan, olmesartan medoxomil, valsartan, telmisartan, and eprosartan), renin inhibitors (e.g., aliskiren), beta blockers (e.g., calcium channel blockers); (11) glucokinase activators (GKAs) (e.g., AZD6370, GKM-001, TMG-123, HMS-5552, DS-7309, PF-04937319, TTP-399, ZYGK-1); (12) inhibitors of 11β-hydroxysteroid dehydrogenase type 1 (e.g., such as those disclosed in U.S. Pat. No. 6,730,690; WO 03/104207; and WO 04/058741); (13) inhibitors of cholesteryl ester transfer protein (CETP), (e.g., torcetrapib, evacetrapib, anacetrapib, and AT-03); (14) inhibitors of fructose 1,6-bisphosphatase (e.g., MB-07803, and such as those disclosed in U.S. Pat. Nos. 6,054,587; 6,110,903; 6,284,748; 6,399,782; and 6,489,476); (15) inhibitors of acetyl CoA carboxylase-1 or 2 (ACC₁ or ACC₂); (16) AMP-activated Protein Kinase (AMPK) activators (e.g., MB-11055); (17) agonists of the G-protein-coupled receptors: (i) GPR-109, (ii) GPR-119 (e.g., MBX2982, and PSN821), (iii) GPR-40 (e.g., fasiglifam, JTT-851, P-11187, 5-[4-[[(1R)-4-[6-(3-hydroxy-3-methylbutoxy)-2-methylpyridine-3-yl]-2,3-dihydro-1H-indene-1-yl]oxy]phenyl]isothiazole-3-ol 1-oxide, 5-(4-((3-(2,6-dimethyl-4-(3-(methylsulfonyl)propoxy)phenyl)phenyl)-methoxy)phenyl)-isothiazole-3-ol 1-oxide, 5-(4-((3-(2-methyl-6-(3-hydroxypropoxy)pyridine-3-yl)-2-methyl-phenyl)methoxy)phenyl)-isothiazole-3-ol 1-oxide, and 5-[4-[[3-[4-(3-aminopropoxy)-2,6-dimethylphenyl]phenyl]-methoxy]phenyl]isothiazole-3-ol 1-oxide), and (iv) GPR-120 (e.g., KDT-501); (18) SSTR3 antagonists (e.g., pasireotide, and such as those disclosed in WO 2009/011836); (19) neuromedin U receptor agonists (e.g., such as those disclosed in WO2009/042053, including, but not limited to, neuromedin S (NMS)); (20) inhibitors of stearoyl-coenzyme A delta-9 desaturase (SCD); (21) GPR-105 antagonists (e.g., such as those disclosed in WO 2009/000087); (22) inhibitors of glucose uptake, such as sodium-glucose transporter (SGLT) inhibitors and its various isoforms, such as SGLT-1; SGLT-2 (e.g., LIK-066, ertuglifozin, ASP1941, luseogliflozin, BI10773, tofogliflozin, LX4211, canagliflozin, dapagliflozin and remogliflozin; and SGLT-3); (23) inhibitors of (i) acyl coenzyme A:diacylglycerol acyltransferase 1, DGAT-1 (e.g., pradigastat, and P-7435) and acyl coenzyme A:diacylglycerol acyltransferase 2, DGAT-2; (24) inhibitors of fatty acid synthase; (25) inhibitors of acyl coenzyme A:monoacylglycerol acyltransferase 1 and 2 (MGAT-1 and MGAT-2); (26) agonists of the TGR5 receptor (also known as GPBAR1, BG37, GPCR19, GPR131, and M-BAR) (eg., sodium taurocholate); (28) bromocriptine mesylate and rapid-release formulations thereof, and (29) IL-1b antibodies and inhibitors (e.g., gevokizumab, canakinumab, danazol, AC-201, and BLX-1002); and (c) a pharmaceutically acceptable carrier.

Specific compounds that may be useful in combination with a compound of the present invention include: simvastatin, mevastatin, ezetimibe, atorvastatin, rosuvastatin, sitagliptin, omarigliptin, metformin, sibutramine, orlistat, topiramate, naltrexone, bupriopion, phentermine, losartan, losartan with hydrochlorothiazide, olmesartan, canagliflozin, dapagliflozin, ipragliflozin and ertugliflozin.

The above combinations include combinations of a compound of the present invention not only with one other active compound, but also with two or more other active compounds. Non-limiting examples include combinations of compounds with two or more active compounds selected from biguanides, sulfonylureas, HMG-CoA reductase inhibitors, PPARγ agonists, DPP-4 inhibitors, anti-obesity compounds, and anti-hypertensive agents.

The present invention may also provide a method for the treatment or prevention of a G-protein coupled receptor 40 (GPR40) mediated disease, which method comprises administration to a patient in need of such treatment or at risk of developing a GPR40 mediated disease of an amount of a GPR40 agonist and an amount of one or more active ingredients, such that together they give effective relief.

In a further aspect of the present invention, there is provided a pharmaceutical composition comprising a GPR40 agonist and one or more active ingredients, together with at least one pharmaceutically acceptable carrier or excipient.

Thus, according to a further aspect of the present invention there is provided the use of a GPR40 agonist and one or more active ingredients for the manufacture of a medicament for the treatment or prevention of a GPR40 mediated disease. In a further or alternative aspect of the present invention, there is therefore provided a product comprising a GPR40 agonist and one or more active ingredients as a combined preparation for simultaneous, separate or sequential use in the treatment or prevention of a GPR40 mediated disease. Such a combined preparation may be, for example, in the form of a twin pack.

For the treatment or prevention of diabetes, obesity, hypertension, Metabolic Syndrome, dyslipidemia, cancer, atherosclerosis, and related disorders thereof, a compound of the present invention may be used in conjunction with another pharmaceutical agent effective to treat that disorder.

The present invention may also provide a method for the treatment or prevention of diabetes, obesity, hypertension, Metabolic Syndrome, dyslipidemia, cancer, atherosclerosis, and related disorders thereof, which method comprises administration to a patient in need of such treatment an effective amount of a compound of the present invention and an amount of another pharmaceutical agent effective to threat that disorder, such that together they give effective relief.

The present invention may also provide a method for the treatment or prevention of diabetes, obesity, hypertension, Metabolic Syndrome, dyslipidemia, cancer, atherosclerosis, and related disorders thereof, which method comprises administration to a patient in need of such treatment an amount of a compound of the present invention and an amount of another pharmaceutical agent useful in treating that particular condition, such that together they give effective relief.

The term “therapeutically effective amount” or “a therapeutically effective dose” means the amount the compound of structural formula I that will elicit the biological or medical response of a tissue, system, animal, mammal or human that is being sought by the researcher, veterinarian, medical doctor or other clinician, which includes alleviation of the symptoms of the disorder being treated. The novel methods of treatment of this invention are for disorders known to those skilled in the art. The term “mammal” includes, but is not limited to, humans, and companion animals such as dogs and cats.

The weight ratio of the compound of the Formula I to the second active ingredient may be varied and will depend upon the effective dose of each ingredient. Generally, a therapeutically effective dose of each will be used. Thus, for example, when a compound of the Formula I is combined with a DPIV inhibitor the weight ratio of the compound of the Formula I to the DPIV inhibitor will generally range from about 1000:1 to about 1:1000, preferably about 200:1 to about 1:200. Combinations of a compound of the Formula I and other active ingredients will generally also be within the aforementioned range, but in each case, an effective dose of each active ingredient should be used.

Methods of Synthesis of the Compounds of the Present Invention:

The following reaction schemes and Examples illustrate methods which may be employed for the synthesis of the compounds of structural formula I described in this invention. Those skilled in the art will readily understand that known variations of protecting groups, as well as of the conditions and processes of the following preparative procedures, can be used to prepare these compounds. It is also understood that whenever a chemical reagent such as a boronic acid or a boronate is not commercially available, such a chemical reagent can be readily prepared following one of numerous methods described in the literature. All temperatures are degrees Celsius unless otherwise noted. Mass spectra (MS) were measured either by electrospray ion-mass spectroscopy (ESMS) or by atmospheric pressure chemical ionization mass spectroscopy (APCI). All temperatures are degrees Celsius unless otherwise noted.

List of Abbreviations

Ac is acetyl; AcCN is acetonitrile; Ac₂O is acetic anhydride; Alk is alkyl; anh. is anhydrous; aq or aq. is aqueous; Ar is aryl; atm is atmosphere; bispin is bis(pinacolato)diboron; Boc is tert-butoxycarbonyl; Bn-O is phenyl-CH₂—O or benzyloxy; Br is broad; n-BuLi is n-butyl lithium; t-BuOK is potassium tert-butoxide; ° C. is degrees celsius; Cataxium precatalyst or Cataxium Pd precat or precatalyst is cataCXium A Pd G3 (Aldrich); Cbz is benzyloxycarbonyl; CH₂Cl₂ is dichloromethane; conc or conc. is concentrated; CV is column volumes; DCM is dichloromethane; DEA is diethyl amine; DIPEA is N,N-diisopropylethylamine; DIPA is diisopropyl amine; DMAP is 4-dimethylaminopyridine; DMF is N,N-dimethylformamide; DMS is dimethyl sulfide; DMSO is dimethylsulfoxide; EA or EtOAc is ethyl acetate; Et is ethyl; Et₂O is diethyl ether; EtMgBr is ethyl magnesium bromide; EtOH is ethanol; g is gram(s); h or hr or hrs is hour(s); hex is hexanes; HPLC is high pressure liquid chromatography; HOAc or AcOH is acetic acid; kg is kilogram(s); IPA is isopropanol; KOAc is potassium acetate; KOtBu is potassium tert-butoxide; L is liter; LAH is lithium aluminum hydride; M is molar; LC-MS is liquid chromatography-mass spectroscopy; LDA is lithium diisopropyl amide; Me is methyl; MeO is methoxy; m-CPBA, MCPBA, or mCPBA is meta chloroperbenzoic acid; ml or mL is milliliter; min or mins is minute(s); mol is mole(s); mmol is mmole(s); mg is milligram(s); MeOH is methyl alcohol or methanol; MPLC is medium pressure liquid chromatography; MS is mass spectroscopy; MsCl or Ms-Cl is methane sulfonyl chloride; MeCN is acetonitrile; MeI is methyl iodide; MsCl is methane sulfonyl chloride; MTBE is methyl tert-butyl ether; N is normal; NaHMDS is sodium hexamethyl disilazide; NH₄OAc is ammonium acetate; NBS is N-bromo succinamide; NEt₃ is triethyl amine; NIS is N-iodo succinamide; NMO is 4-methyl morpholine N-oxide; NMP is 1-methyl-2-pyrrolidinone; NMR is nuclear magnetic resonance spectroscopy; o.n. or ON is overnight; PE is petroleum ether; PG is protecting group; i-PrOH is isopropanol; Pd(OAc)₂ is palladium acetate; Pd(PPh₃)₄ is tetrakis or tetrakis(triphenyl-phosphine)palladium(0); PPh₃ is triphenyl phosphine; precat is precatalyst; PdCl₂(dppf)-CH₂C₁₂ is [1,1′-Bis(diphenylphosphino)ferrocene]dichloropalladium(II), complex with dichloromethane; prep is preparative; prep. TLC or prep-TLC, or prep TCL is preparative thin layer chromatography; rt or r.t. or RT is room temperature; Ru-Josiphos is generated using (Me-allyl)₂Ru(COD) (Aldrich) and Josiphos SL-J502-2 (Aldrich); R_(f) is retention factor; sat or sat. is saturated; SEM is trimethylsilyl ethoxy methyl, SEMC₁ is trimethylsilyl ethoxy methyl chloride; SFC is supercritical fluid chromatography; S-Phos is 2-dicyclohexylphosphino-2′,6′-dimethoxy-biphenyl; S-Phos(Pd) is chloro(2-dicyclohexylphosphino-2′,6′-dimethoxy-1,1′-biphenyl)[2-(2-aminoethylphenyl)-]palladium(II) [CAS-No. 1028206-58-7]; S-Phos precatalyst is S-Phos Pd G2 precatalyst-Aldrich; S-Phos second generation precatalyst is Chloro(2-dicyclohexyl-phosphino-2′,6′-dimethoxy-1,1′-biphenyl)[2-(2′-amino-1,1′-biphenyl)]palladium-(II), SPhos-Pd-G2) [CAS-No. 1375325-64-6]; TBAF is tetrabutylammonium fluoride; TBSCl is tert-butyl dimethylsilyl chloride; TEA is triethyl amine; Tf is trifluoromethane sulfonyl; THF is tetrahydrofuran; TFA is trifluoroacetic acid; TLC is thin-layer chromatography; Tos and Ts is p-toluene sulfonyl; TosCl and TsCl is p-toluene sulfonyl chloride; pTSA, pTsOH and TsOH is p-toluenesulfonic acid; Ts₂O is tosic anhydride orp-toluene sulfonic anhydride; and xphos is 2-dicyclohexylphosphino-2′,4′,6′-triisopropyl-biphenyl; and 2^(nd) generation XPhos precatalyst is Chloro(2-dicyclohexylphosphino-2′,4′,6′-triisopropyl-1,1′-biphenyl)[2-(2′-amino-1,1′-biphenyl)]palladium(II), THF adduct [CAS#: 1310584-14-5].

Several methods for preparing the compounds of this invention are illustrated in the following Schemes and Examples. Starting materials are either commercially available or made by known procedures in the literature or as illustrated. The present invention further provides processes for the preparation of compounds of structural formula I as defined above. In some cases the order of carrying out the foregoing reaction schemes may be varied to facilitate the reaction or to avoid unwanted reaction products. The following Schemes and Examples are provided to illustrate the invention and are not to be construed as limiting the invention in any manner. The scope of the invention is defined by the appended claims.

Scheme 1 provides a route to Intermediate 1. The cyclopropyl 0-ketoester was methylated and then trapped at the vinyl tosylate. Suzuki cross-coupling with m-benzyloxy phenylboronic acid delivered the “Z” enoate. Asymmetric reduction of the double bond was followed by debenzylation under hydrogen pressure.

Intermediate 1 (2R,3R)-Methyl 3-cyclopropyl-3-(3-hydroxyphenyl)-2-methylpropanoate

Step 1: methyl 3-cyclopropyl-2-methyl-3-oxopropanoate

A slurry of NaH (0.563 g, 60% in mineral oil) in THF (20 mL) was cooled to 10° C., then methyl 3-cyclopropyl-3-oxopropanoate (2 g) was added in portions at room temperature over 30 minutes. Then MeI (0.88 mL) was added over 5 minutes at room temperature and the reaction was stirred at room temperature overnight. The reaction was then reverse quenched into a half saturated sodium bicarbonate solution (100 mL) and EtOAc (100 mL). The aqueous layer was separated and extracted once with 50 mL EtOAc. The combined organic layers were washed with water and brine, and concentrated to give the title compound, which was used in the next step without further purification.

Step 2: (Z)-methyl 3-cyclopropyl-2-methyl-3-(tosyloxy)acrylate

To a solution of methyl 3-cyclopropyl-2-methyl-3-oxopropanoate (5 g) in MTBE (50 mL) was added a IM solution of NaHMDS in hexane (41 mL) keeping the internal temperature between 18-23° C. The reaction was stirred at room temperature for 30 min. Then tosic anhydride (10 g) was slurried in MTBE (200 mL), followed by the addition of the reaction mixture to the tosic anhydride slurry, while keeping the internal temperature between 19° C. and 24° C. After stirring 30 min, additional tosic anhydride (3.3 g, 0.3 eq) was added, and the reaction was stirred for 1 h. Then water (500 mL) and EtOAc (400 mL) were added to the reaction mixture. The aqueous layer was separated and extracted once with EtOAc. (100 mL) The combined organic layers were washed with water (200 mL) and brine (100 mL), and then concentrated to give the crude product, which was recrystallized from with MTBE/heptanes (1:1, 50 mL) to give the title compound.

Step 3: (Z)-methyl 3-(3-(benzyloxy)phenyl)-3-cyclopropyl-2-methylacrylate

(Z)-methyl 3-cyclopropyl-2-methyl-3-(tosyloxy)acrylate (1.03 g) was dissolved in MeCN (10 mL), then aqueous potassium phosphate (1 M, 10 mL) was added, followed by (3-(benzyloxy)phenyl)boronic acid (1 g). The resulting slurry was degassed with a nitrogen stream for 30 min, then cataxium precatalyst (100 mg) was added and the reaction was heated to 35° C. for 14 h. The slurry was then filtered through Celite™, and the Celite™ was washed with EtOAc (20 mL).

Then EtOAc (40 mL) and water (50 mL) were added to the filtrate. The aqueous layer was separated, and extracted once with EtOAc (20 mL). The combined organic layers were washed with water (50 mL) and brine (20 mL), then concentrated to give a crude oil, which was purified via ISCO™ silica column (40 g, diluted with 0-30% Hexanes/EtOA) to give the title compound.

Step 4: (2S,3R)-methyl 3-(3-(benzyloxy)phenyl-3-cyclopropyl-2-methylpropanoate

Bis(2-methylallyl)(1,5-cyclooctadiene)Ruthenium (II) (1.0 g) and Josiphos (1.86 g) were added to DCM (12 mL) and agitated for 20 min at rt. Then tetrafluoroboric acid-diethyl ether complex (1.0 g) was added slowly and stirred for 20 min at rt. Then the reaction mixture was diluted with DCM (100 mL) and added to a catalyst bomb with a MeOH rinse. (Z)-methyl 3-(3-(benzyloxy)phenyl)-3-cyclopropyl-2-methylacrylate (2.57 g, 7.97 mmol) was added to the catalyst bomb with MeOH (200 mL) and agitated to dissolve, The catalyst bomb was pressurized to 500 psi with hydrogen, then heated to 80° C. and shaken for 20 h. Then the reaction was cooled, filtered through Celite™ and washed with MeOH. The filtrate was concentrated to give the crude title compound.

Step 5: (2S,3R)-methyl 3-cyclopropyl-3-(3-hydroxyphenyl)-2-methylpropanoate

To a solution of (2S,3S)-methyl 3-(3-(benzyloxy)phenyl)-3-cyclopropyl-2-methylpropanoate (4.81 g, 13 mmol) and methanol (67 ml) in a 25 ml glass shaker vessel, was added 8% Pd-2% Pt/C-(1.5 g, 35 wt % loading, 50 w/w, Johnson Matthey lot# F27N23). Then the shaker vessel was evacuated and purged with nitrogen three times, and charged with 50 psig of hydrogen gas. The reaction was heated to 25° C. for 6 h, then filtered through Celite™, which was rinsed with MeOH (50 mL). The filtrate was concentrated to give the title compound.

Intermediate 2 (2S,3R)-methyl 3-cyclopropyl-3-(3-hydroxy-4-iodophenyl)-2-methylpropanoate

To a 0° C. solution of (2S,3R)-methyl 3-cyclopropyl-3-(3-hydroxyphenyl)-2-methyl-propanoate (1 g, 4.27 mmol) in DCM (10 mL) was added NIS (0.960 g, 4.27 mmol) slowly over several minutes. After 2 hours, the reaction mixture was poured into saturated aqueous Na₂SO₃ (50 mL). The organic layer was separated, dried over Na₂SO₄, and concentrated. The resulting residue was purified by HPLC (ISCO 120 gram, 0 to 50% EtOAc/Hex) to give the title compound. ¹H NMR (500 MHz, CDCl₃) δ7.60 (d, 1H), 6.85 (s, 1H), 6.50 (d, 1H), 5.30 (br, 1H), 3.75 (s, 3H), 2.80 (m, 1H), 1.90 (t, 1H), 1.05 (m, 1H), 0.97 (d, 3H), 0.60 (m, 1H), 0.37 (m, 1H), 0.27 (m, 1H), 0.01 (m, 1H). (m/z): 361.07 (M+H)⁺.

Intermediate 3 4′-ethynyl-2-fluoro-5-methoxy-1,1′-biphenyl

Step 1: 2′-fluoro-5′-methoxy-[1,1′-biphenyl]-4-carbaldehyde

To a nitrogen-purged solution of 4-bromobenzaldehyde (1.47 g, 7.95 mmol), tetrakis(triphenyl-phosphine)palladium(0) (0.275 g, 0.238 mmol), and (2-fluoro-5-methoxyphenyl)boronic acid (2.025 g, 11.92 mmol)) in dioxane (10 mL) was added a solution of K₂CO₃ (7.95 ml, 15.89 mmol) in water (7.95 mL). The reaction mixture was then heated to 100° C. on a heating block. After 16 h, the reaction mixture was cooled to room temperature and poured into saturated aqueous NH₄Cl (100 mL). The mixture was extracted with EtOAc (2×100 mL). The combined organic layers were dried (MgSO₄) and concentrated. The resulting residue was purified by HPLC (ISCO 120 g, 0 to 40% EtOAc/Hex) to give the title compound. ¹H NMR (500 MHz, CDCl₃) δ10.08 (s, 1H), 7.96 (d, 2H), 7.71 (d, 2H), 7.10 (t, 1H), 6.99 (m, 1H), 6.90 (m, 1H), 3.83 (s, 3H).

Step 2: 4′-ethynyl-2-fluoro-5-methoxy-1,1′-biphenyl

To a slurry of 2′-fluoro-5′-methoxy-[1,1′-biphenyl]-4-carbaldehyde (1 g, 4.34 mmol) and K₂CO₃ (1.201 g, 8.69 mmol) in methanol (30 mL) was added dimethyl (1-diazo-2-oxopropyl)phosphonate (1.085 g, 5.65 mmol). After 2 hours, the reaction mixture was poured into NH₄Cl (50 mL) and extracted with EtOAc (2×50 mL). The combined organic layers were dried (MgSO₄) and concentrated. The resulting residue was purified by HPLC (ISCO 120 g, 0 to 30% EtOAc/Hex) to give the title compound. 1H NMR (500 MHz, CDCl₃) δ7.59 (d, 2H), 7.50 (d, 2H), 7.08 (t, 1H), 6.93 (m, 1H), 6.84 (m, 1H), 3.82 (s, 3H), 3.14 (s, 1H).

Intermediate 4 3′-bromo-2,6-dimethyl-1,1′-biphenyl

To a solution of 3-bromo-iodobenzene (1.063 ml, 8.33 mmol) and 2,6-dimethylboronic acid (1 g, 6.67 mmol) in dioxane (25 ml) were added LiOH (2 M, 11.67 ml, 23.34 mmol) and Pd(Ph₃P)₄ (0.385 g, 0.333 mmol). The reaction mixture was flushed with N₂ and heated in an oil bath at 50° C. After 16 hours, the reaction was partitioned between Et₂O/H₂O (2×). The combined organic layers were washed with brine, dried (Na₂SO₄) and evaporated. Purification of the resulting residue on a silica gel flash column (hexanes) gave the title compound.

Intermediate 5 Ethyl 3-(2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzofuran-5-yl)propanoate

To a degassed solution of ethyl 3-(benzofuran-5-yl)propanoate (100 mg, 0.458 mmol) and bis(pinacolato)diboron (116 mg, 0.458 mmol) was added chloro(1,5-cyclooctadiene)iridium(I) dimer (4.62 mg, 6.87 μmol) and 4,4′-di-tert-butyl-2,2′-bipyridine (3.69 mg, 0.014 mmol). The reaction mixture was sparged with nitrogen gas for several minutes, then heated under microwave to 100° C. After 60 minutes, the reaction was cooled to room temperature. Then the reaction mixture was poured into saturated NaHCO₃ (25 mL) and extracted with diethyl ether (2×25 mL). The combined organic layers were dried (MgSO₄) and concentrated. The resulting residue was purified by flash chromatography (5-20% EtOAc/Hex) to give the title compound.

Example 1 (2S,3R)-3-cyclopropyl-3-(2-(2′-fluoro-5′-methoxy-[1,1′-biphenyl]-4-yl)benzofuran-6-yl)-2-methylpropanoic acid

Step 1: (2S,3R)-methyl 3-cyclopropyl-3-(2-(2′-fluoro-5′-methoxy-[1,1′-biphenyl]-4-yl)benzofuran-6-yl)-2-methylpropanoate

To a sparged solution of 4′-ethynyl-2-fluoro-5-methoxy-1,1′-biphenyl (163 mg, 0.722 mmol), (2S,3R)-methyl 3-cyclopropyl-3-(3-hydroxy-4-iodophenyl)-2-methylpropanoate (200 mg, 0.555 mmol), bis(triphenylphosphine)palladium (II) chloride (39.0 mg, 0.056 mmol), and copper (I) iodide (10.58 mg, 0.056 mmol) in NMP (25 ml) was added 1,1,3,3-tetramethylguanidine (640 mg, 5.55 mmol). The reaction mixture was heated to 60 degrees. After 3 hours, the reaction was poured into saturated aqueous NH₄Cl (50 mL) and extracted with EtOAc (2×50 mL). The combined organic layers were dried (MgSO₄) and concentrated. The resulting residue was purified by HPLC (ISCO 40 gram, 0 to 40% EtOAc/Hex) to give the title compound. ¹H NMR (500 MHz, CDCl₃) δ7.90 (d, 2H), 7.61 (d, 2H), 7.50 (d, 1H), 7.32 (s, 1H), 7.10-7.00 (m, 3H), 6.96 (m, 1H), 6.80 (m, 1H), 3.80 (s, 3H), 3.70 (s, 3H), 2.88 (m, 1H), 2.05 (t, 1H), 1.11 (m, 1H), 0.95 (d, 3H), 0.58 (m, 1H), 0.32 (m, 1H), 0.28 (m, 1H), 0.01 (m, 1H). (m/z): 459.59 (M+H)⁺.

Step 2: (2S,3R)-3-cyclopropyl-3-(2-(2′-fluoro-5′-methoxy-[1,1′-biphenyl]-4-yl)benzofuran-6-yl)-2-methylpropanoic acid

To a solution of (2S,3R)-methyl 3-cyclopropyl-3-(2-(2′-fluoro-5′-methoxy-[1,1′-biphenyl]-4-yl)benzofuran-6-yl)-2-methylpropanoate (250 mg, 0.545 mmol) in MeOH/THF/water (1:1:1; 3 mL total volume) was added LiOH (131 mg, 5.45 mmol). The reaction mixture was heated to 60° C. After 16 hours, the reaction was poured into 1N HCl (10 mL) and extracted with EtOAc (2×10 mL). The combined organic layers were dried (MgSO₄) and concentrated. The resulting residue was purified by HPLC (ISCO 40 g, 0 to 100 EtOAc/Hex) to give the title compound. ¹H NMR (500 MHz, CDCl₃) δ7.92 (d, 2H), 7.63 (d, 2H), 7.54 (d, 1H), 7.38 (s, 1H), 7.10 (m, 1H), 7.05 (s, 1H), 7.00 (m, 1H), 6.85 (m, 1H), 3.85 (s, 3H), 2.95 (m, 1H), 2.15 (t, 1H), 1.20 (m, 1H), 1.02 (d, 3H), 0.68 (m, 1H), 0.40 (m, 2H), 0.08 (m, 1H). (m/z): 445.57 (M+H)⁺.

TABLE 1 Example was prepared in a similar manner to Example 1 using the appropriate starting materials. Example LC/MS No. Structure (M + H)⁺ 2

432.61

Example 3 (2S,3R)-3-cyclopropyl-3-(2-(2′-fluoro-5′-methoxy-[1,1′-biphenyl]-4-yl)-2,3-dihydrobenzofuran-6-yl)-2-methylpropanoic acid

Step 1: (2S,3R)-methyl 3-cyclopropyl-3-(2-(2′-fluoro-5′-methoxy-[1,1′-biphenyl]-4-yl)-2,3-dihydrobenzofuran-6-yl)-2-methylpropanoate

To a solution of (2S,3R)-3-cyclopropyl-3-(2-(2′-fluoro-5′-methoxy-[1,1′-biphenyl]-4-yl)benzofuran-6-yl)-2-methylpropanoic acid (22 mg, 0.049 mmol) in EtOAc (3 mL) was added Pd/C (3 mg, 0.028 mmol). The reaction mixture was stirred vigorously under a balloon of hydrogen gas. After 24 hours, the reaction was vented and then filtered through Celite™. The filtrate was concentrated in vacuo to give the title compound, which was used in the next step without further purification.

Step 2: (2S,3R)-3-cyclopropyl-3-(2-(2′-fluoro-5′-methoxy-[1,1′-biphenyl]-4-yl)-2,3-dihydrobenzofuran-6-yl)-2-methylpropanoic acid

To a solution of (2S,3R)-methyl 3-cyclopropyl-3-(2-(2′-fluoro-5′-methoxy-[1,1′-biphenyl]-4-yl)-2,3-dihydrobenzofuran-6-yl)-2-methylpropanoate (10 mg, 0.022 mmol) in MeOH/THF/water (1.5 mL) was added LiOH (5.20 mg, 0.217 mmol). The reaction mixture was heated and stirred on a heating block at 60° C. After 16 hours, the reaction mixture was poured into 1N HCl (10 mL) and extracted with EtOAc (2×10 mL). The combined organic layers were dried (MgSO₄) and concentrated. The resulting residue was purified by silica gel HPLC (0 to 100% EtOAc/Hex) to give the title compound. ¹H NMR (500 MHz, CDCl₃): δ 7.50 (d, 2H), 7.42 (d, 2H), 7.06 (d, 1H), 7.00 (t, 1H), 6.88 (m, 1H), 6.76 (m, 1H), 6.66 (s, 1H), 6.63 (d, 1H), 5.73 (t, 1H), 3.76 (s, 3H), 3.58 (dd, 1H), 3.19 (dd, 1H), 2.80 (m, 1H), 1.91 (t, 1H), 1.05 (m, 1H), 0.96 (d, 3H), 0.59 (m, 1H), 0.31 (m, 2H), 0.00 (m, 1H). (m/z): 447.51 (M+H)⁺.

TABLE 2 Example 4 was prepared in a similar manner to Example 3 using the appropriate starting materials. Example LC/MS No. Structure (M + H)⁺ 4

434.28

Example 5 and 6 (2S,3R)-3-cyclopropyl-3-(2-(2-fluoro-4-(2-methoxypyridin-4-yl)benzyl)-2,3-dihydrobenzofuran-6-yl)-2-methylpropanoic acid

Step 1: 1-(4-Chloro-2-fluorophenyl)prop-2-en-1-ol

To a mixture of 4-chloro-2-fluorobenzaldehyde (1.29 g, 8.14 mmol) in THF (40 mL, anhydrous) at 0° C. was added dropwise vinyl magnesium bromide (9.76 ml, 9.76 mmol. IM in THF). After 5 minutes, the reaction was quenched by the addition of saturated NH₄Cl, and the resulting mixture was extracted with EtOAc (2×). The combined organic layers were washed with brine, dried over MgSO₄, and concentrated in vacuo. The resulting residue was purified by column chromatography on silica (0-40% EtOAc/hexanes) to afford the title compound. ¹H NMR (500 MHz, CDCl₃): δ 7.37 (t, J=8.10 Hz, 1H), 7.14 (d, J=8.44 Hz, 1H), 7.06 (dd, J=10.06 Hz and 2.00 Hz, 1H), 5.98-6.05 (m, 1H), 5.46 (d, J=5.73 Hz, 1H), 5.35 (d, J=17.13 Hz, 1H), 5.21 (d, J=10.38 Hz, 1H).

Step 2: (2S,3R)-methyl 3-(4-(3-(4-chloro-2-fluorophenyl)-3-oxopropyl)-3-hydroxyphenyl)-3-cyclopropyl-2-methylpropanoate

To a flask charged with 1-(4-chloro-2-fluorophenyl)prop-2-en-1-ol (1.3151 g, 7.05 mmol), and (2S,3R)-methyl 3-cyclopropyl-3-(3-hydroxy-4-iodophenyl)-2-methylpropanoate (2.2 g, 6.11 mmol) was added toluene (40.7 mL, anhydrous). The mixture was sparged with N₂ for 5 minutes, then t-buxphos palladacycle (0.210 g, 0.305 mmol) was added, followed by the addition of N,N-dicyclohexylmethylamine (1.962 ml, 9.16 mmol). The resulting reaction mixture was sparged with N₂ for 2 minutes, and then heated under N₂ in a heating block at 90° C. for 2 hours. The reaction mixture was then partitioned between EtOAc and saturated NH₄Cl.

The organic layer was separated, washed with brine, dried over MgSO₄, and concentrated in vacuo. The resulting residue was purified by column chromatography on silica (0-70% EtOAc/hexanes) to afford the title compound. ¹H NMR (500 MHz, CDCl₃): δ 7.88 (t, J=8.21 Hz, 1H), 7.15-7.24 (m, 2H), 7.02 (d, J=7.72 Hz, 1H), 6.68 (s, 1H), 6.63 (d, J=7.69 Hz, 1H), 3.69 (s, 3H), 3.38 (q, J=5.13 Hz, 2H), 2.97 (t, J=5.98 Hz, 2H), 2.73-2.77 (m, 1H), 1.83 (t, J=10.12 Hz, 1H), 0.98-1.02 (m, 1H), 0.92 (dd, J=14.60 Hz and 6.87 Hz, 3H), 0.017-0.51 (m, 4H).

Step 3: (2S,3R)-methyl 3-(2-(4-chloro-2-fluorobenzoyl)-2,3-dihydrobenzofuran-6-yl)-3-cyclopropyl-2-methylpropanoate

To a solution of (2S,3R)-methyl 3-(4-(3-(4-chloro-2-fluorophenyl)-3-oxopropyl)-3-hydroxyphenyl)-3-cyclopropyl-2-methylpropanoate (40 mg, 0.095 mmol) in THF (1 mL, anhydrous) was added phenyltrimethylammonium tribromide (35.9 mg, 0.095 mmol) at ambient temperature under N₂. After 40 minutes, an additional phenyltrimethylammonium tribromide (10 mg) was added to the reaction mixture. After stirring for 40 minutes, the reaction was quenched by the addition of 5% aqueous sodium thiosulfate, and partitioned between EtOAc and saturated NaHCO₃. The organic layer was separated, washed with brine, dried over MgSO₄, and concentrated in vacuo to afford (2S,3R)-methyl 3-(4-(2-bromo-3-(4-chloro-2-fluorophenyl)-3-oxopropyl)-3-hydroxy phenyl)-3-cyclopropyl-2-methylpropanoate as a crude residue. The resulting residue was dissolved in acetone (2.5 mL), and potassium carbonate (27.8 mg, 0.201 mmol) was added. The reaction was heated to 55° C. for 30 minutes, then filtered and washed with acetone. The filtrate was concentrated in vacuo and the resulting residue was purified by column chromatography on silica (0-40% EtOAc/hexanes) to afford the title compound. MS: 417 (M+1).

Step 4: (2S,3R)-methyl 3-(2-((4-chloro-2-fluorophenyl)(hydroxy)methyl)-2,3-dihydrobenzofuran-6-yl)-3-cyclopropyl-2-methylpropanoate

NaBH₄ (0.237 g, 6.26 mmol) was added to a stirred, ambient temperature mixture of (2S,3R)-methyl 3-(2-(4-chloro-2-fluorobenzoyl)-2,3-dihydrobenzofuran-6-yl)-3-cyclopropyl-2-methylpropanoate (0.870 g, 2.087 mmol) in ethanol (10 ml) and THF (10 ml). The mixture was stirred at ambient temperature for 2 hours, then quenched carefully with saturated aqueous ammonium chloride, followed by the addition of EtOAc. The reaction mixture was stirred for 1 h. Then the layers were separated and the aqueous layer was extracted with EtOAc (20 mL). The organic layers were combined, washed with brine, dried over anhydrous Na₂SO₄, and concentrated in vacuo. The resulting crude residue was purified by column chromatography on silica (0-40% EtOAc/hexanes) to give the title compound. MS: 419 (M+1).

Step 5: (2S,3R)-methyl 3-(2-(4-chloro-2-fluorobenzyl)-2,3-dihydrobenzofuran-6-yl)-3-cyclopropyl-2-methylpropanoate

To a solution of (2S,3R)-methyl 3-(2-((4-chloro-2-fluorophenyl)(hydroxy)methyl)-2,3-dihydrobenzofuran-6-yl)-3-cyclopropyl-2-methylpropanoate (0.3054 g, 0.729 mmol) in acetonitrile (5 mL, anhydrous) was added DMAP (0.445 g, 3.65 mmol) at r.t. under N₂. The resulting solution was cooled to 0° C. and phenyl chlorothionocarbonate (0.151 mL, 1.094 mmol) was added dropwise. The resulting yellow mixture was warmed to ambient temperature and stirred for 30 minutes. Then the reaction was partitioned between CH₂Cl₂ and saturated NaHCO₃. The aqueous layer was back-extracted with CH₂Cl₂. The organic layers were combined, dried over MgSO₄, and concentrated in vacuo. The resulting residue was purified by column chromatography on silica (0-50% EtOAc/hexane) to give (2S,3R)-methyl 3-(2-((4-chloro-2-fluorophenyl)((phenoxycarbonothioyl)oxy)methyl)-2,3-dihydrobenzofuran-6-yl)-3-cyclopropyl-2-methylpropanoate as an oil. The oil was transferred to a microwave vial and dissolved in toluene (6 mL, anhydrous). The reaction vessel was evacuated and filled with N₂ (3×), then tri-n-butyltin hydride (0.508 mL, 1.896 mmol) was added, followed by AIBN (0.060 g, 0.365 mmol). The reaction was evacuated and filled with N₂ (3×), then sealed, and heated to 110° C. in a heating block for 45 minutes. The reaction was then concentrated in vacuo and purified by column chromatography on silica (0-40% EtOAc/hexanes) to give afford the title compound. ¹H NMR (500 MHz, CDCl₃): δ 7.25-7.30 (m, 1H), 7.12-7.15 (m, 3H), 6.62-6.64 (m, 1H), 5.32 (s, 1H), 5.01 (t, J=7.53 Hz, 1H), 3.74 (s, 3H), 3.27 (dd, J=15.48 Hz and 8.89 Hz, 1H), 3.03-3.14 (m, 2H), 2.93 (dd, J=15.49 Hz and 7.35 Hz, 1H), 2.79 (t, J=7.51 Hz, 1H), 1.86 (t, J=10.16 Hz, 1H), 1.03-1.29 (m, 1H), 0.96 (dd, J=6.87 Hz and 2.74 Hz, 3H), 0.23-0.56 (m, 4H).

Step 6: (2S,3R)-methyl 3-cyclopropyl-3-(2-(2-fluoro-4-(2-methoxypyridin-4-yl)benzyl)-2,3-dihydrobenzofuran-6-yl)-2-methylpropanoate

To a solution of (2S,3R)-methyl 3-(2-(4-chloro-2-fluorobenzyl)-2,3-dihydrobenzofuran-6-yl)-3-cyclopropyl-2-methylpropanoate (0.2418 g, 0.600 mmol) and (2-methoxypyridin-4-yl)boronic acid (0.1884 g, 1.232 mmol) in THF (6.00 ml, anhydrous)/3 M aqueous potassium phosphate (0.600 ml, 1.801 mmol), sparged with N₂ for 3 minutes, was added 2^(nd) generation XPhos precatalyst (0.047 g, 0.060 mmol). The mixture was sparged with N₂ for 1 minute, then sealed and heated to 80° C. for 1.5 hours. Then the reaction mixture was partitioned between EtOAc and saturated NH₄Cl. The organic layer was separated, washed with brine, dried over MgSO₄, and concentrated in vacuo. The resulting residue was purified by column chromatography on silica (0-40% EtOAc/hexanes) to give the title compound. MS: 476 (M+1).

Step 7: (2S,3R)-3-cyclopropyl-3-(2-(2-fluoro-4-(2-methoxypyridin-4-yl)benzyl)-2,3-dihydrobenzofuran-6-yl)-2-methylpropanoic acid

To a solution of (2S,3R)-methyl 3-cyclopropyl-3-(2-(2-fluoro-4-(2-methoxypyridin-4-yl)benzyl)-2,3-dihydrobenzofuran-6-yl)-2-methylpropanoate (0.2767 g, 0.582 mmol) in THF (4.5 ml)/MeOH (4.5 ml) was added 1 M LiOH (4.5 ml, 4.50 mmol) at r.t. The resulting mixture was heated to 55° C. for 16 hours. Then the reaction was concentrated in vacuo. The resulting residue was suspended in EtOAc and 1 N HCl (4.5 ml) was added. The resulting mixture was partitioned between EtOAc and saturated NH₄Cl/brine. The aqueous layer was back-extracted with EtOAc. The combined organic layers were dried over MgSO₄, and concentrated in vacuo to give a white solid. The solid was triturated with ether and the insoluble solids were collected by filtration. The filtrate was purified by column chromatography on silica (0-100% EtOAc/hexane). The pure fractions obtained from the chromatography were combined with the insoluble solid to give the title compound as a mixture of two diastereomers. The mixture of two diastereomers was purified by chiral SFC (AD-H column, 1:1 MeOH/AcCN)/CO₂) to afford 2 isomers Isomer A (Example 5) and Isomer B (Example 6):

Example 5—Isomer A (faster eluting): MS: 463 (M+1). ¹H NMR (500 MHz, CDCl₃): δ 8.20 (d, J=5.35 Hz, 1H), 7.28-7.45 (m, 3H), 7.06 (d, J=6.61 Hz, 2H), 6.90 (s, 1H), 6.60-6.63 (m, 2H), 5.04 (p, J=7.36 Hz, 1H), 3.97 (s, 3H) 3.28 (dd, J=15.48 Hz and 8.89 Hz, 1H), 3.19 (dd, J=14.05 Hz and 7.45 Hz, 1H), 3.05 (dd, J=14.02 Hz and 5.87 Hz, 1H), 2.98 (dd, J=15.50 Hz and 7.35 Hz, 1H), 2.74-2.82 (m, 1H), 1.94 (t, J=9.93 Hz, 1H), 1.06-1.18 (m, 1H), 0.97 (d, J=6.85 Hz, 3H), 0.34-0.60 (m, 4H).

Example 6—Isomer B (slower eluting): MS: 463 (M+1). ¹H NMR (500 MHz, CDCl₃): δ 8.20 (d, J=5.35 Hz, 1H), 7.28-7.45 (m, 3H), 7.06 (d, J=6.61 Hz, 2H), 6.90 (s, 1H), 6.60-6.63 (m, 2H), 5.04 (p, J=7.36 Hz, 1H), 3.97 (s, 3H) 3.28 (dd, J=15.48 Hz and 8.89 Hz, 1H), 3.19 (dd, J=14.05 Hz and 7.45 Hz, 1H), 3.05 (dd, J=14.02 Hz and 5.87 Hz, 1H), 2.98 (dd, J=15.50 Hz and 7.35 Hz, 1H), 2.74-2.82 (m, 1H), 1.94 (t, J=9.93 Hz, 1H), 1.06-1.18 (m, 1H), 0.97 (d, J=6.85 Hz, 3H), 0.34-0.60 (m, 4H).

Example 7 3-(2-(2′,6′-dimethyl-[1,1′-biphenyl]-3-yl)benzofuran-5-yl)propanoic acid

Step 1: ethyl 3-(2-(2′,6′-dimethyl-[1,1′-biphenyl]-3-yl)benzofuran-5-yl)propanoate

To a solution of 3′-bromo-2,6-dimethyl-1,1′-biphenyl (66.4 mg, 0.254 mmol) and ethyl 3-(2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzofuran-5-yl)propanoate (70 mg, 0.203 mmol) in dioxane (3 mL) was added LiOH (2N, 0.356 ml, 0.712 mmol) and PdCl₂(dppf)-CH₂C₁₂ (16.61 mg, 0.020 mmol). The mixture was heated by microwave to 80° C. After 25 minutes, the reaction was cooled to room temperature and then poured into saturated NH₄Cl (10 mL). The resulting mixture was extracted with EtOAc (2×10 mL). The combined organic layers were dried (MgSO₄) and concentrated. The resulting residue was purified by HPLC (0 to 40% EtOAc/Hex) to give the title compound.

Step 2: 3-(2-(2′,6′-dimethyl-[1,1′-biphenyl]-3-yl)benzofuran-5-yl)propanoic acid

To a solution of ethyl 3-(2-(2′,6′-dimethyl-[1,1′-biphenyl]-3-yl)benzofuran-5-yl)propanoate (81 mg, 0.203 mmol) in methanol/water (2:1, 3 mL total volume) was added LiOH (24.31 mg, 1.015 mmol). The reaction was stirred at room temperature. After 3 days, the reaction mixture was poured into 1N HCl (10 mL) and extracted with EtOAc (2×10 ml).

The combined organic layers were dried (MgSO₄) and concentrated. The resulting residue was purified by silica gel flash chromatography (hexanes, then 5% EtOAc in hexanes, then 79:20:1 hexanes:EtOAc:AcOH) to give the title compound. (m/z): 371.1 (M+H)⁺.

TABLE 3 Examples 8-14 were prepared in a similar manner to Example 7 using the appropriate starting materials Example LC/MS No. Structure (M + H)⁺ 8

335.08 9

405.10 10

401.12 11

443.07 12

389.10 13

389.2 14

411.05

Example 15 3-(2-(4′-methoxy-2′,6′-dimethyl-[1,1′-biphenyl]-3-yl)-2,3-dihydrobenzofuran-5-yl))propanoic acid

To a solution of 3-(2-(4′-methoxy-2′,6′-dimethyl-[1,1′-biphenyl]-3-yl)benzofuran-5-yl)propanoic acid (40 mg, 0.100 mmol) in acetic acid (3 mL) was added Pd(OH)₂ (10 mg, 20 wt %). The heterogeneous reaction mixture was shaken on a Parr shaker under 50 psi hydrogen gas. After 24 h, the reaction was filtered through Celite™ and concentrated. The resulting residue was purified by flash chromatography (50% EtOAc, 49% Hexanes, 1% HOAc) to give the title compound. (m/z): 403.15 (M+H)⁺.

TABLE 4 Examples 16-18 were prepared in a similar manner to Example 15 using the appropriate starting materials Example Stereoisomers/ LC/MS No. Structure Chiral Conditions (M + H)⁺ 16

Isomer A OJ Column 25% MeOH/Heptane 403.15 17

Isomer A OJ column 25% MeOH/Heptane 403.15 18

Racemic 373.17

Example of a Pharmaceutical Composition

As a specific embodiment of an oral pharmaceutical composition, a 100 mg potency tablet is composed of 100 mg of any one of Examples, 268 mg microcrystalline cellulose, 20 mg of croscarmellose sodium, and 4 mg of magnesium stearate. The active, microcrystalline cellulose, and croscarmellose are blended first. The mixture is then lubricated by magnesium stearate and pressed into tablets.

Biological Assays Generation of GPR40-Expressing Cells:

Human and mouse GPR40 stable cell-lines were generated in CHO cells stably expressing NFAT BLA (Beta-lactamase). A human GPR40 stable cell-line was generated in HEK cells stably expressing the aequorin expressing reporter. The expression plasmids were transfected using lipofectamine (Life Technologies) following manufacturer's instructions. Stable cell-lines were generated following drug selection.

FLIPR Assays:

FLIPR (Fluorimetric Imaging Plate Reader, Molecular Devices) assays were performed to measure agonist-induced calcium mobilization of the stable clones. For the FLIPR assay, one day before assay, GPR40/CHO NFAT BLA cells were seeded into black-wall-clear-bottom 384-well plates (Costar) at 1.4×10e4 cells/20 μL medium/well. The cells were incubated with 20 μl/well of the assay buffer (HBSS, 0.1% BSA, 20 mM HEPES, 2.5 mM probenecid, pH 7.4) containing 8 μM fluo-4,AM, 0.08% pluronic acid at room temperature for 100 minutes. Fluorescence output was measured using FLIPR. Compounds were dissolved in DMSO and diluted to desired concentrations with assay buffer. 13.3 L/well of compound solution was added. FLIPR assay EC₅₀ values for specific compounds are listed in Table I.

Inositol Phosphate Turnover (IP1) Assay 1:

The assay is performed in 384-well format. HEK cells stably expressing human GPR40 are plated at 15,000 cells per well in growth medium (DMEM/10% fetal calf serum). Cell plates are then incubated 16 hours at 37 degrees in a 5% CO₂ incubator.

Measurement of Inositol Phosphate Turnover (IP1) is performed using the CisBio IP-One kit (Part number 62IPAPEB). After the 16 hour incubation, the cells are washed with HEPES buffer and 10 ul of stimulation buffer (prepared as described in the kit) is added to each well. In a separate plate, compounds are diluted in DMSO (400-fold over the final concentration in the assay well) and 25 nl is transferred via pocket tip to the appropriate well in the assay cell plate. The plates are then incubated for 60 minutes at 37 degrees. 10 ul of detection buffer (also prepared as described in the IP-One kit) is added to each well and the plates are incubated for 60 minutes in the dark. The plates are then read in a Perkin Elmer EnVision or equivalent reader able to measure FRET. Fluorescent ratio of emission at 665 and 620 nm is then converted to IP1 concentration by back calculating from an IP1 standard curve prepared at the time of the assay. Inositol Phophate Turnover (IP1) Assay 1 EC₅₀ values for specific compounds are listed in Table I.

Inositol Phosphate Turnover (IP1) Assay 2:

The assay is performed in 384-well format. HEK cells stably expressing human GPR40 are plated at 15,000 cells per well in growth medium (DMEM/10% fetal calf serum). Cell plates are then incubated 16 hours at 37 degrees in a 5% CO₂ incubator.

Measurement of Inositol Phosphate Turnover (IP1) is performed using the CisBio IP-One kit (Part number 62IPAPEB). After the 16 hour incubation, the cells are washed with HEPES buffer and 10 ul of stimulation buffer (prepared as described in the kit) is added to each well. In a separate plate, compounds are diluted in DMSO (400-fold over the final concentration in the assay well) and 25 nl is acoustically transferred to the appropriate well in the assay cell plate. The plates are then incubated for 60 minutes at 37 degrees. 10 ul of detection buffer (also prepared as described in the IP-One kit) is added to each well and the plates are incubated for 60 minutes in the dark. The plates are then read in a Perkin Elmer EnVision or equivalent reader able to measure FRET. Fluorescent ratio of emission at 665 and 620 nm is then converted to IP1 concentration by back calculating from an IP1 standard curve prepared at the time of the assay. Inositol Phophate Turnover (IP1) Assay 2 EC₅₀ values for specific compounds are listed in Table I.

The compounds of the present invention, including the compounds in Examples 1-18, have either EC₅₀ values less than 10 micromolar (μM) in the FLIPR assay described above, or have EC₅₀ values less than 6500 nanomolar (nM) in either the Inositol Phophate Turnover (IP1) Assay 1 or the Inositol Phophate Turnover (IP1) Assay 2 described above.

TABLE I Inositol Inositol Phosphate Phosphate Turnover Turnover (IP1) (IP1) Example Human FLIPR Assay 1, Assay 2, Number Stereoisomers EC₅₀, nM EC₅₀, nM EC₅₀, nM 1 Single isomer N/D 66 N/D 2 Single isomer N/D 215 N/D 3 2 Diastereomers N/D 105 N/D 4 2 Diastereomers N/D 311 N/D 5 Isomer A N/D N/D 35 6 Isomer B N/D N/D 37 7 Single isomer 203 3224 N/D 8 Single isomer 20940 N/D N/D 9 Single isomer 815 3690 N/D 10 Single isomer 540 N/D N/D 11 Single isomer 1187 4581 N/D 12 Single isomer 716 >10000 N/D 13 Single isomer 306 6211 N/D 14 Single isomer 726 >10000 N/D 15 2 diastereomers 1487 N/D N/D 16 Isomer A 624 5871 N/D 17 Isomer B 4315 3943 N/D 18 Racemic 1221 N/D N/D *Isomer A = first eluting peak from chiral column; Isomer B = second eluting peak from chiral column; “N/D” is not determined

In Vivo Studies:

Male C57BL/6N mice (7-12 weeks of age) are housed 10 per cage and given access to normal diet rodent chow and water ad libitum. Mice are randomly assigned to treatment groups and fasted 4 to 6 h. Baseline blood glucose concentrations are determined by glucometer from tail nick blood. Animals are then treated orally with vehicle (0.25% methylcellulose) or test compound. Blood glucose concentration is measured at a set time point after treatment (t=0 min) and mice are then intraperitoneally-challenged with dextrose (2 g/kg). One group of vehicle-treated mice is challenged with saline as a negative control. Blood glucose levels are determined from tail bleeds taken at 20, 40, 60 min after dextrose challenge. The blood glucose excursion profile from t=0 to t=60 min is used to integrate an area under the curve (AUC) for each treatment. Percent inhibition values for each treatment are generated from the AUC data normalized to the saline-challenged controls.

While the invention has been described and illustrated with reference to certain particular embodiments thereof, those skilled in the art will appreciate that various adaptations, changes, modifications, substitutions, deletions, or additions of procedures and protocols may be made without departing from the scope of the invention. For example, effective dosages other than the particular dosages as set forth herein above may be applicable as a consequence of variations in responsiveness of the mammal being treated for any of the indications with the compounds of the invention indicated above. The specific pharmacological responses observed may vary according to and depending upon the particular active compounds selected or whether there are present pharmaceutical carriers, as well as the type of formulation and mode of administration employed, and such expected variations or differences in the results are contemplated in accordance with the objects and practices of the present invention. 

1. A compound of structural formula I:

or a pharmaceutically acceptable salt thereof; wherein “a” is a single bond or a double bond, provided that if “a” is a double bond, then R⁵ and R⁶ are absent; T is selected from the group consisting of: (1) CH, (2) N, and (3) N-oxide; U is selected from the group consisting of: (1) CR¹, (2) N, and (3) N-oxide; V is selected from the group consisting of: (1) CR², (2) N, and (3) N-oxide; W is selected from the group consisting of: (1) CH, (2) N, and (3) N-oxide, provided that no more than two of T, U, V and W are selected from N and N-oxide, further provided that if both T and W are N or N-oxide, then R³ is absent, and further provided that both U and V are not N or N-oxide; X is selected from the group consisting of: (1) oxygen, (2) sulfur, (3) —CR^(g)R^(g), (4) S(O)₂, (5) C═O, (6) —C(R^(g))OC₁₋₆alkyl, (7) —CF₂, and (8) —NR^(c); A is selected from the group consisting of: (1) aryl, (2) —C₁₋₆alkyl-aryl, (3) —C(O)-aryl, (4) heteroaryl, (5) —C₁₋₆alkyl-heteroaryl, (6) —C(O)-heteroaryl, (7) —C₃₋₆cycloalkyl, (8) —C₁₋₆alkyl-C₃₋₆cycloalkyl, (9) —C(O)—C₃₋₆cycloalkyl, (10) —C₂₋₅cycloheteroalkyl, (11) —C₁₋₆alkyl-C₂₋₅cycloheteroalkyl, and (12) —C(O)—C₂₋₅cycloheteroalkyl, wherein A is unsubstituted or substituted with one to five substituents independently selected from R^(a); B is selected from the group consisting of: (1) hydrogen, (2) aryl, (3) aryl-O—, (4) aryl-C₁₋₁₀ alkyl-, (5) aryl-C₁₋₁₀ alkyl-O—, (6) C₃₋₆cycloalkyl, (7) C₃₋₆cycloalkyl-C₁₋₁₀alkyl-, (8) C₃₋₆cycloalkyl-C₁₋₁₀alkyl-O—, (9) C₃₋₆cycloalkenyl, (10) C₃₋₆cycloalkenyl-C₁₋₁₀alkyl-, (11) C₃₋₆cycloalkenyl-C₁₋₁₀alkyl-O—, (12) C₂₋₅cycloheteroalkyl, (13) C₃₋₆cycloheteroalkyl-C₁₋₁₀alkyl-, (14) C₃₋₆cycloheteroalkyl-C₁₋₁₀alkyl-O—, (15) heteroaryl, (16) heteroaryl-O—, (17) heteroaryl-C₁₋₁₀ alkyl-, and (18) heteroaryl-C₁₋₁₀ alkyl-O—, wherein B is unsubstituted or substituted with one to five substituents selected from R^(b); R¹ and R² are each independently selected from: (1) a bond, (2) hydrogen, (3) halogen, (4) —OR^(k), (5) —CN, (6) —C₁₋₆alkyl, (7) —C₃₋₆cycloalkyl, (8) —C₃₋₆cycloalkyl-C₁₋₃alkyl-, (9) —C₂₋₆cycloheteroalkyl, and (10) —C₂₋₆cycloheteroalkyl-C₁₋₃alkyl-, wherein each alkyl, cycloalkyl and cycloheteroalkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein one of R¹ and R² is substituted with R⁷, or R¹ and R² together with the atom(s) to which they are attached form a C₃₋₆cycloalkyl ring or a C₂₋₅cycloheteroalkyl ring containing 0-2 additional heteroatoms independently selected from oxygen, sulfur and N—R^(g), wherein each R¹ and R² is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein one of R¹ and R² is substituted with R⁷; R³ is absent or if present R³ is selected from the group consisting of: (1) hydrogen, (2) halogen, (3) —OR^(e), (4) —CN, (5) —C₁₋₆alkyl, (6) —C₃₋₆cycloalkyl, and (7) C₃₋₆cycloalkyl-C₁₋₃alkyl-, wherein each alkyl and cycloalkyl is unsubstituted or substituted with one to three substituents independently selected from R^(i); R⁴ is selected from the group consisting of: (1) hydrogen, (2) halogen, (3) OR^(e), (4) C₀₋₅alkylNR^(c)R^(d), (5) C₁₋₆alkyl, (6) C₁₋₆alkyl-O—, (7) C₃₋₆cycloalkyl, (8) C₃₋₆cycloalkyl-O—, (9) C₃₋₆cycloalkyl-C₁₋₁₀alkyl-, (10) C₃₋₆cycloalkyl-C₁₋₁₀alkyl-O—, (11) C₂₋₅cycloheteroalkyl, (12) C₂₋₅cycloheteroalkyl-O—, (13) C₂₋₅cycloheteroalkyl-C₁₋₁₀alkyl-, (14) C₂₋₅cycloheteroalkyl-C₁₋₁₀alkyl-O—, (15) aryl, (16) aryl-O—, (17) aryl-C₁₋₁₀alkyl-, (18) heteroaryl, (19) heteroaryl-O—, and (20) heteroaryl-C₁₋₁₀alkyl-, wherein each alkyl, cycloalkyl, cycloheteroalkyl, aryl and heteroaryl is unsubstituted or substituted with one to three substituents independently selected from R^(j); R⁵ is absent or if present R⁵ is selected from the group consisting of: (1) hydrogen, (2) —C₁₋₆alkyl, and (3) —C₃₋₆cycloalkyl, wherein each alkyl and cycloalkyl is unsubstituted or substituted with one to three substituents independently selected from R^(j); R⁶ is absent or if present R⁶ is selected from the group consisting of: (1) hydrogen, (2) —C₁₋₆alkyl, and (3) —C₃₋₆cycloalkyl, wherein each alkyl and cycloalkyl is unsubstituted or substituted with one to three substituents independently selected from R^(j); R⁷ is selected from the group consisting of: (1) —CO₂R⁸, (2) —C₁₋₆alkyl-CO₂R⁸, (3) —C₁₋₆alkyl-CONHSO₂R^(m), (4) —C₁₋₆alkyl-SO₂NHCOR^(m), (5) —C₁₋₆alkyl-tetrazolyl, and (6) a cycloheteroalkyl selected from the group consisting of:

R⁸ is selected from the group consisting of: (1) hydrogen, (2) —C₁₋₆alkyl, (3) —C₃₋₆cycloalkyl, and (4) aryl-C₁₋₆alkyl, wherein each alkyl, cycloalkyl and aryl is unsubstituted or substituted with one to three substituents independently selected from R^(j); R^(a) is selected from the group consisting of: (1) —C₁₋₆alkyl, (2) halogen, (3) —C₀₋₆alkyl-OR^(e), (4) —C₀₋₆alkyl-NR^(c)S(O)_(n)R^(e), (5) —C₀₋₆alkyl-S(O)_(n)R^(e), (6) —C₀₋₆alkyl-S(O)_(n)NR^(c)R^(d), (7) —C₀₋₆alkyl-NR^(c)R^(d), (8) —C₀₋₆alkyl-C(O)R^(e), (9) —C₀₋₆alkyl-OC(O)R^(e), (10) —C₀₋₆alkyl-CO₂R^(e), (11) —C₀₋₆alkyl-CN, (12) —C₀₋₆alkyl-C(O)NR^(c)R^(d), (13) —C₀₋₆alkyl-NR^(c)C(O)R^(e), (14) —C₀₋₆alkyl-NR^(c)C(O)OR^(e), (15) —C₀₋₆alkyl-NR^(c)C(O)NR^(c)R^(d), (16) —CF₃, (17) —OCF₃, (18) —OCHF₂, (19) —C₀₋₆alkyl-aryl, (20) —C₀₋₆alkyl-heteroaryl, (21) —C₀₋₆alkyl-C₃₋₁₀cycloalkyl, (22) —C₀₋₆alkyl-C₃₋₁₀cycloalkenyl, and (23) —C₀₋₆alkyl-C₂₋₁₀cycloheteroalkyl, wherein each alkyl, cycloalkyl, cycloalkenyl, cycloheteroalkyl, aryl and heteroaryl is unsubstituted or substituted with one to five substituents independently selected from: —C₁₋₆alkyl, halogen, OH, —O—C₁₋₆alkyl, —S(O)₂—C₁₋₄alkyl, —CN, —OCHF₂, —OCF₃, —CF₃, and —C₀₋₆alkyl-NR^(c)R^(d); R^(b) is independently selected from the group consisting of: (1) —C₁₋₁₀alkyl, (2) —C₂₋₁₀alkenyl, (3) —CF₃, (4) halogen, (5) —CN, (6) —OH, (7) —OC₁₋₁₀alkyl, (8) —OC₂₋₁₀alkenyl, (9) —O(CH₂)pOC₁₋₁₀alkyl, (10) —O(CH₂)pC₃₋₆cycloalkyl, (11) —O(CH₂)pC₃₋₆ cycloalkyl-C₁₋₁₀alkyl, (12) —O(CH₂)pC₂₋₅cycloheteroalkyl, (13) —O(CH₂)pC₂₋₅cycloheteroalkyl-C₁₋₁₀alkyl, (14) —O-aryl, (15) —O-heteroaryl, (16) —O-aryl-C₁₋₁₀alkyl, (17) —O-heteroaryl-C₁₋₁₀alkyl, (18) —O(CH₂)pNR^(c)S(O)_(m)R^(e), (19) —O(CH₂)pS(O)_(m)R^(e), (20) —O(CH₂)pS(O)_(m)NR^(c)R^(d), (21) —O(CH₂)pNR^(c)R^(d), (22) —C(O)R^(e), (23) —OC(O)R^(e), (24) —CO₂R^(e), (25) —C(O)NR^(c)R^(d), (26) —NR^(c)C(O)R^(e), (27) —NR^(c)C(O)OR^(e), (28) —NR^(c)C(O)NR^(c)R^(d), (29) —O(CH₂)pO-C₃₋₆cycloalkyl, (30) —O(CH₂)pO—C₂₋₅ cycloheteroalkyl, (31) —OCF₃, (32) —OCHF₂, (33) —(CH₂)pC₃₋₆cycloalkyl, (34) —(CH₂)pC₂₋₅cycloheteroalkyl, (35) aryl, (36) heteroaryl, (37) aryl-C₁₋₁₀alkyl-, and (38) heteroaryl-C₁₋₁₀alkyl-, wherein each CH, CH₂, alkyl, alkenyl, cycloalkyl, cycloheteroalkyl, aryl and heteroaryl is unsubstituted or substituted with one to five substituents independently selected from: —C₁₋₆alkyl, halogen, OH, —O—C₁₋₆alkyl and —CF₃; R^(c) and R^(d) are each independently selected from the group consisting of: (1) hydrogen, (2) C₁₋₁₀alkyl, (3) C₂₋₁₀alkenyl, (4) C₃₋₆cycloalkyl, (5) C₃₋₆ cycloalkyl-C₁₋₁₀alkyl-, (6) C₂₋₅cycloheteroalkyl, (7) C₂₋₅cycloheteroalkyl-C₁₋₁₀alkyl-, (8) aryl, (9) heteroaryl, (10) aryl-C₁₋₁₀alkyl-, and (11) heteroaryl-C₁₋₁₀alkyl-, wherein each alkyl, alkenyl, cycloalkyl, cycloheteroalkyl, aryl and heteroaryl is unsubstituted or substituted with one to three substituents independently selected from R^(f), or R^(c) and R^(d) together with the atom(s) to which they are attached form a C₂₋₁₀cycloheteroalkyl ring containing 0-2 additional heteroatoms independently selected from oxygen, sulfur and N—R^(g), wherein each R^(c) and R^(d) is unsubstituted or substituted with one to three substituents independently selected from R^(f); each R^(e) is independently selected from the group consisting of: (1) hydrogen, (2) —C₁₋₁₀alkyl, (3) —C₂₋₁₀ alkenyl, (4) —C₃₋₆ cycloalkyl, (5) —C₃₋₆ cycloalkyl-C₁₋₁₀alkyl-, (6) —C₂₋₅cycloheteroalkyl, (7) —C₂₋₅cycloheteroalkyl-C₁₋₁₀alkyl-, (8) aryl, (9) aryl-C₁₋₁₀alkyl-, (10) heteroaryl, and (11) heteroaryl-C₁₋₁₀alkyl-, wherein each alkyl, alkenyl, cycloalkyl, cycloheteroalkyl, aryl and heteroaryl is unsubstituted or substituted with one to three substituents independently selected from R^(h); each R^(f) is selected from the group consisting of: (1) halogen, (2) C₁₋₁₀alkyl, (3) —OH, (4) —O—C₁₋₄alkyl, (5) —S(O)_(m)—C₁₋₄alkyl, (6) —CN, (7) —CF₃, (8) —OCHF₂, and (9) —OCF₃, wherein each alkyl is unsubstituted or substituted with one to three substituents independently selected from: —OH, halogen, C₁₋₆alkyl, cyano and S(O)₂C₁₋₆alkyl; each R^(g) is selected from the group consisting of: (1) hydrogen, (2) —C(O)R^(e), and (3) —C₁₋₁₀alkyl, wherein each alkyl is unsubstituted or substituted with one to five halogens; each R^(h) is selected from the group consisting of: (1) halogen, (2) C₁₋₁₀alkyl, (3) —OH, (4) —O—C₁₋₄alkyl, (5) —S(O)_(m)—C₁₋₄alkyl, (6) —CN, (7) —CF₃, (8) —OCHF₂, and (9) —OCF₃, wherein each alkyl is unsubstituted or substituted with one to three substituents independently selected from: —OH, halogen, C₁₋₆alkyl, cyano and S(O)₂C₁₋₆alkyl; each R¹ is independently selected from the group consisting of: (1) —C₁₋₆alkyl, (2) —OR^(e), (3) —NR^(c)S(O)_(m)R^(e), (4) halogen, (5) —S(O)_(m)R^(e), (6) —S(O)_(m)NR^(c)R^(d), (7) —NR^(c)R^(d), (8) —C(O)R^(e), (9) —OC(O)R^(e), (10) —CO₂R^(e), (11) —CN, (12) —C(O)NR^(c)R^(d), (13) —NR^(c)C(O)R^(e), (14) —NR^(c)C(O)OR^(e), (15) —NR^(c)C(O)NR^(c)R^(d), (16) —CF₃, (17) —OCF₃, (18) —OCHF₂, (19) —C₃₋₆cycloalkyl, and (20) —C₂₋₅cycloheteroalkyl; each R^(j) is independently selected from the group consisting of: (1) —C₁₋₆alkyl, (2) —OR^(e), (3) —NR^(c)S(O)_(m)R^(e), (4) halogen, (5) —S(O)_(m)R^(e), (6) —S(O)_(m)NR^(c)R^(d), (7) —NR^(c)R^(d), (8) —C(O)R^(e), (9) —OC(O)R^(e), (10) —CO₂R^(e), (11) —CN, (12) —C(O)NR^(c)R^(d), (13) —NR^(c)C(O)R^(e), (14) —NR^(c)C(O)OR^(e), (15) —NR^(c)C(O)NR^(c)R^(d), (16) —CF₃, (17) —OCF₃, (18) —OCHF₂, (19) —C₃₋₆cycloalkyl, and (20) —C₂₋₅cycloheteroalkyl; each R^(k) is independently selected from the group consisting of: (1) hydrogen, (2) —C₁₋₆ alkyl, (3) —C₁₋₆alkyl-SO₂C₁₋₆alkyl, (4) —CF₃, and (5) —CHF₂, wherein each alkyl is unsubstituted or substituted with one to three substituents independently selected from: —OH, —OC₁₋₆alkyl, halogen, cyano, and —S(O)₂C₁₋₆alkyl; each R^(L) is independently selected from the group consisting of: (1) —CO₂C₁₋₆alkyl, (2) —C₁₋₁₀alkyl, (3) —C₂₋₁₀ alkenyl, (4) —C₂₋₁₀alkynyl, (5) —C₃₋₆cycloalkyl, (6) —C₂₋₆cycloheteroalkyl, (7) aryl, and (8) heteroaryl, wherein each alkyl, alkenyl, alkynyl, cycloalkyl, cycloheteroalkyl, aryl and heteroaryl is unsubstituted or substituted with one to four substituents independently selected from C₁₋₆alkyl, halogen, and —OC₁₋₆alkyl; each R^(m) is independently selected from the group consisting of: (1) —C₁₋₁₀alkyl, (2) —C₂₋₁₀ alkenyl, (3) —C₃₋₆ cycloalkyl, (4) —C₃₋₆ cycloalkyl-C₁₋₁₀alkyl-, (5) —C₂₋₅cycloheteroalkyl, (6) —C₂₋₅cycloheteroalkyl-C₁₋₁₀alkyl-, (7) aryl, (8) heteroaryl, (9) aryl-C₁₋₁₀alkyl-, and (10) heteroaryl-C₁₋₁₀alkyl-; each n is independently selected from: 0, 1 or 2; each m is independently selected from: 0, 1 or 2; each p is independently selected from: 0, 1, 2, 3, 4, 5 or 6; and each r is independently selected from: 0, 1, 2 and
 3. 2. The compound according to claim 1 wherein “a” is a single bond and R⁵ and R⁶ are present; or a pharmaceutically acceptable salt thereof.
 3. The compound according to claim 1 wherein “a” is a double bond and R⁵ and R⁶ are absent; or a pharmaceutically acceptable salt thereof.
 4. The compound according to claim 1 wherein T is CH; U is CR¹; V is CR²; and W is CH; or a pharmaceutically acceptable salt thereof.
 5. The compound according to claim 1 wherein X is oxygen; or a pharmaceutically acceptable salt thereof.
 6. The compound according to claim 1 wherein A is selected from the group consisting of: (1) aryl, (2) C₁₋₆alkyl-aryl, and (3) heteroaryl, wherein A is unsubstituted or substituted with one to five substituents independently selected from R^(a); or a pharmaceutically acceptable salt thereof.
 7. The compound according to claim 1 wherein B is selected from the group consisting of: (1) hydrogen, (2) aryl, and (3) heteroaryl, wherein each aryl and heteroaryl is unsubstituted or substituted with one to five substituents independently selected from R^(b); or a pharmaceutically acceptable salt thereof.
 8. The compound according to claim 1 wherein B is selected from the group consisting of: (1) aryl, and (2) heteroaryl, wherein each aryl and heteroaryl is unsubstituted or substituted with one to five substituents independently selected from R^(b); or a pharmaceutically acceptable salt thereof.
 9. The compound according to claim 1 wherein R¹ and R² are each independently selected from: (1) hydrogen, and (2) —C₁₋₆alkyl, wherein one of R¹ and R² is —C₁₋₆alkyl substituted with R⁷, and wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L); or a pharmaceutically acceptable salt thereof.
 10. The compound according to claim 1 wherein R³ is absent or hydrogen; R⁴ is hydrogen; R⁵ is absent or hydrogen; and R⁶ is absent or hydrogen; or a pharmaceutically acceptable salt thereof.
 11. The compound according to claim 1 wherein R⁷ is —CO₂R⁸; or a pharmaceutically acceptable salt thereof.
 12. The compound according to claim 1 wherein R⁸ is hydrogen; or a pharmaceutically acceptable salt thereof.
 13. The compound according to claim 1 wherein T is CH; U is CR¹; V is CR²; W is CH; X is oxygen; A is selected from the group consisting of: (1) aryl, (2) C₁₋₆alkyl-aryl, and (3) heteroaryl, wherein A is unsubstituted or substituted with one to five substituents independently selected from R^(a); B is selected from the group consisting of: (1) hydrogen, (2) aryl, and (3) heteroaryl, wherein each aryl and heteroaryl is unsubstituted or substituted with one to five substituents independently selected from R^(b); R¹ and R² are each independently selected from: (1) hydrogen, and (2) —C₁₋₆alkyl, wherein one of R¹ and R² is —C₁₋₆alkyl substituted with R⁷, and wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L); R³ is absent or hydrogen; R⁴ is hydrogen; R⁵ is absent or hydrogen; R⁶ is absent or hydrogen; R⁷ is —CO₂R⁸; and R⁸ is hydrogen; or a pharmaceutically acceptable salt thereof.
 14. The compound according to claim 1 wherein T is CH; U is CR¹; V is CR²; W is CH; X is oxygen; A is selected from the group consisting of: (1) aryl, (2) C₁₋₆alkyl-aryl, and (3) heteroaryl, wherein A is unsubstituted or substituted with one to five substituents independently selected from R^(a); B is selected from the group consisting of: (1) aryl, and (2) heteroaryl, wherein each aryl and heteroaryl is unsubstituted or substituted with one to five substituents independently selected from R^(b); R¹ is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷; R² is hydrogen; R³ is absent or hydrogen; R⁴ is hydrogen; R⁵ is absent or hydrogen; R⁶ is absent or hydrogen; R⁷ is —CO₂R⁸; and R⁸ is hydrogen; or a pharmaceutically acceptable salt thereof.
 15. The compound according to claim 1 of structural Formula Im:

wherein A is selected from the group consisting of: (1) aryl, (2) C₁₋₆alkyl-aryl, and (3) heteroaryl, wherein A is unsubstituted or substituted with one to five substituents independently selected from R^(a); B is selected from the group consisting of: (1) aryl, and (2) heteroaryl, wherein each aryl and heteroaryl is unsubstituted or substituted with one to five substituents independently selected from R^(b); R¹ is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷; R² is hydrogen; R⁴ is hydrogen; R⁵ is hydrogen; R⁶ is hydrogen; R⁷ is —CO₂R⁸; R⁸ is hydrogen; and R^(L) is selected from the group consisting of: —C₁₋₁₀alkyl and —C₃₋₆cycloalkyl; or a pharmaceutically acceptable salt thereof.
 16. The compound according to claim 1 of structural Formula In:

wherein A is selected from the group consisting of: (1) aryl, and (2) heteroaryl, wherein A is unsubstituted or substituted with one to five substituents independently selected from R^(a); B is selected from the group consisting of: (1) hydrogen, and (2) aryl, wherein each aryl is unsubstituted or substituted with one to five substituents independently selected from R^(b); R¹ is —C₁₋₆alkyl, wherein alkyl is unsubstituted or substituted with one to three substituents independently selected from R^(L), and wherein R¹ is substituted with R⁷; R² is hydrogen; R⁴ is hydrogen; R⁵ is hydrogen; R⁶ is hydrogen; R⁷ is —CO₂R⁸; R⁸ is hydrogen; and R^(L) is selected from the group consisting of: —C₁₋₁₀alkyl and —C₃₋₆cycloalkyl; or a pharmaceutically acceptable salt thereof.
 17. The compound according to claim 16 selected from:

or a pharmaceutically acceptable salt thereof.
 18. A pharmaceutical composition comprising a compound of claim 1, or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable carrier.
 19. (canceled)
 20. (canceled)
 21. (canceled)
 22. A method of treating type 2 diabetes mellitus in a patient in need of treatment comprising the administration to the patient of a therapeutically effective amount of a compound of claim 1, or a pharmaceutically acceptable salt thereof.
 23. (canceled)
 24. (canceled) 